ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source...

36
S 2015, August 23 th -28 th , 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source Nathalie Lecesne GANIL For the LISOL and REGLIS3 collaboration

Transcript of ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source...

Page 1: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 1In gas-jet isomer selective laser ion source Nathalie Lecesne

In Gas-Jet Isomer Selective

Laser Ion Source

Nathalie Lecesne

GANILFor the LISOL and REGLIS3 collaboration

ICIS 2015 August 23th -28th 2015 New York 2In gas-jet isomer selective laser ion source Nathalie Lecesne

The nuclear physicist playground

bull ~7000 bound nuclei between 2ltZlt120bull gt3000 experimentally observed

Target Ion source

ISOL Isotope Separator On Line

Target

Spectrometer

In flight

Target Gas cell

IGLIS In Gas Laser Ionization and Spectroscopy

ICIS 2015 August 23th -28th 2015 New York 3In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Resonant Ionisation Laser Ion Source

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

RILIS from radioactive ions production hellip

Chemical selectivity Isobaric contamination

Universal gt80 of chemical elements

Tunable laser system

Saturation Short pulsed laser(5-50ns with ~ 01-10mJpulse)

ICIS 2015 August 23th -28th 2015 New York 4In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Hyperfine structure coupling of nucleus with electronic orbital

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 5In gas-jet isomer selective laser ion source Nathalie Lecesne

Sizes

Spins

Qs

μ

Model Independent(measured)

20 μeV

Isotope shift dltr2gt

Isomer shift dltr2gt

Hyperfine Splitting

Model Dependent(inferred)

Dynamic static

deformations

Single few particle

configurations

Y+

STABLE

MO

RE

NE

UT

RO

N R

ICH

Courtesy of I Moore

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 2: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 2In gas-jet isomer selective laser ion source Nathalie Lecesne

The nuclear physicist playground

bull ~7000 bound nuclei between 2ltZlt120bull gt3000 experimentally observed

Target Ion source

ISOL Isotope Separator On Line

Target

Spectrometer

In flight

Target Gas cell

IGLIS In Gas Laser Ionization and Spectroscopy

ICIS 2015 August 23th -28th 2015 New York 3In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Resonant Ionisation Laser Ion Source

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

RILIS from radioactive ions production hellip

Chemical selectivity Isobaric contamination

Universal gt80 of chemical elements

Tunable laser system

Saturation Short pulsed laser(5-50ns with ~ 01-10mJpulse)

ICIS 2015 August 23th -28th 2015 New York 4In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Hyperfine structure coupling of nucleus with electronic orbital

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 5In gas-jet isomer selective laser ion source Nathalie Lecesne

Sizes

Spins

Qs

μ

Model Independent(measured)

20 μeV

Isotope shift dltr2gt

Isomer shift dltr2gt

Hyperfine Splitting

Model Dependent(inferred)

Dynamic static

deformations

Single few particle

configurations

Y+

STABLE

MO

RE

NE

UT

RO

N R

ICH

Courtesy of I Moore

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 3: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 3In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Resonant Ionisation Laser Ion Source

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

RILIS from radioactive ions production hellip

Chemical selectivity Isobaric contamination

Universal gt80 of chemical elements

Tunable laser system

Saturation Short pulsed laser(5-50ns with ~ 01-10mJpulse)

ICIS 2015 August 23th -28th 2015 New York 4In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Hyperfine structure coupling of nucleus with electronic orbital

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 5In gas-jet isomer selective laser ion source Nathalie Lecesne

Sizes

Spins

Qs

μ

Model Independent(measured)

20 μeV

Isotope shift dltr2gt

Isomer shift dltr2gt

Hyperfine Splitting

Model Dependent(inferred)

Dynamic static

deformations

Single few particle

configurations

Y+

STABLE

MO

RE

NE

UT

RO

N R

ICH

Courtesy of I Moore

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 4: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 4In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Hyperfine structure coupling of nucleus with electronic orbital

Excitedstates

Ionization Potential

E1

En

erg

y

0 eV E0

Ion +

E2

EIP

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 5In gas-jet isomer selective laser ion source Nathalie Lecesne

Sizes

Spins

Qs

μ

Model Independent(measured)

20 μeV

Isotope shift dltr2gt

Isomer shift dltr2gt

Hyperfine Splitting

Model Dependent(inferred)

Dynamic static

deformations

Single few particle

configurations

Y+

STABLE

MO

RE

NE

UT

RO

N R

ICH

Courtesy of I Moore

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 5: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 5In gas-jet isomer selective laser ion source Nathalie Lecesne

Sizes

Spins

Qs

μ

Model Independent(measured)

20 μeV

Isotope shift dltr2gt

Isomer shift dltr2gt

Hyperfine Splitting

Model Dependent(inferred)

Dynamic static

deformations

Single few particle

configurations

Y+

STABLE

MO

RE

NE

UT

RO

N R

ICH

Courtesy of I Moore

hellipTo nuclear properties via laser spectroscopy

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 6: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 6In gas-jet isomer selective laser ion source Nathalie Lecesne

diams IGLIS of RIBrsquos Developped at KU Leuven since the late 1980rsquos

In-Gas Laser Ionization and spectroscopy

Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401 Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

ICIS Brightne

ss AWARD

2013Yuri

KudryavtsevKU

Leuven

tape station windmill

excimer 1

excimer 2

dye

reference cell

He-Ne

λ-meter

gas cell

CYCLONE 110cyclotron beamLouvain-La-Neuve

SPIG

acceloptics

dipole magnet

collector plates

SHG

SEM

Ionization chamber

Laser Hut

dye

~ 15 m

measuring station

Max rep 200 Hz

λ1

λ2

target

Argon 200-500 mbar

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 7: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 7In gas-jet isomer selective laser ion source Nathalie Lecesne

227Ac

226Ac

225Ac

215Ac

214Ac

213Ac

212Ac

TRIU

MF

228005 228010 228015 228020 228025 228030 228035 228040 228045 228050

Coun

ts (a

rb U

)

Wavenumbers (cm-1)

PhD A Teigelhoefer

In Gas Cell Spectroscopy on Ac

Ac

X

Courtesy of S Raeder and R Ferrer

Higher resolution needed

bull Actinium isotopes 212-215Ac

bull HFS splitting measured

bull Low count rate 214Ac 1 pps

212Ac 04 pps

bull Resolution of 6 GHz

bull 1 efficiency

bull Pressure shift determined

212-215Ac

197Au(20Ne-145 MeV4-5n)212213Ac

197Au(22Ne-143 MeV4-5n)214215Ac

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 8: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 8In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

bull For 550 mbar Argon FWHM ~ 67GHz

bull For high efficiency Laser bandwidth matches the pressure broadening

Limitations of gas cell

228036 228037 228038 228039 228040 228041 228042 2280430

50

100

150

200

250 550 mbar 360 mbar 280 mbar 210 mbar

Alp

ha c

ount

s in

50

s

Wavenumbers (cm-1)

215Ac

Argon

200 250 300 350 400 450 500 550 600

2280388

2280390

2280392

2280394

cent

roid

(cm

-1)

pressure (mbar)

sh

= 42(8) MHzmbar

Pressure Shift

200 250 300 350 400 450 500 550 600010

015

020

025

030

035

coll

= 122(2) MHzmbar

wid

th (

cm-1)

pressure (mbar)

Pressure Broadening

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 9: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 9In gas-jet isomer selective laser ion source Nathalie Lecesne

diams The Doppler broadeningAtomic vapour has a Maxwell-Boltzmann distribution of velocities

Limitations of the gas cell

Th

Pressurebroadening

Dopplerbroadening

(300 K)

229Th

300K amp 300mbar

Doppler broadening (FWHM) asymp 2GHz

Pressure broadening (FWHM)asymp 4 GHz

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 10: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 10In gas-jet isomer selective laser ion source Nathalie Lecesne

diams From In-Gas Cell

diams To In Gas Jet

Reduction of spectral Bandwidth

I Moore et al AIP Conf Proc 831 (2006) 511Yu Kudryavtsev et al NIM B 297 (2013) 7

M Mach number u stream velocity a speed of sound

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 11: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 11In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In gas jet Pressure density temperature

Reduction of spectral Bandwidth

Yu Kudryavtsev et al NIM B 297 (2013) 7

bull Mach 12 T=6K ρ = 0003 ρ0

bull For transition 3274nm in CuDoppler FWHM = 200MHzTotal Broadening = 420MHz

Divergence of the jet

3274 nm 4s2S12 rarr 4p2P12 (Cu)

Doppler vs Mach number

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 12: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 12In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Borrowing ideas from rocket science

de Laval nozzle

M Reponen ID Moore et al NIMA 635 (2011) 24

15 cm

Reduction of jet divergence

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 13: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 13In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

Changes for on-line in-jet demonstration

bull High repetition rate TiSa laser system (10 kHz) [Mainz GANIL]

bull Narrow bandwidth injection locked laser [JYFL]

bull De-Laval Nozzle for shaped gas jet (Mach 5 )

R Ferrer et al NIM B 291 (2012) 29

T Kessler et al Laser physics 18 7 (2008) 842

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 14: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 14In gas-jet isomer selective laser ion source Nathalie Lecesne

0

100

200

22802 22803 228040

100

Frequency (cm-1)

Apha

counts

in 5

0 s

215Ac

214AcT frac12 = 82s

T frac12 = 017s

In-gas jet

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 15: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 15In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 16: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 16In gas-jet isomer selective laser ion source Nathalie Lecesne

On-Line Gas-jet ionization at LISOL

Tisa

λ-metergas cell

CYCLONE 110cyclotron beam

SPIG

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Rep rate 10 kHz

SHG

target

Argon 350mbar

20MHz

5GHz

0

100

200

300

400

22802 22803 228040

100

200

300

Apha

counts

in 1

00 s

in

50

s

Frequency (cm-1)

In-gas jet in gas cell215Ac

214AcT frac12 = 82s

T frac12 = 017s

hfs triplet in 214Ac

bull Resolution ~ 5e-7bull FWHM lt 400MHz(laser power jet T and divergence)bull Selectivity ~200bull Efficiency ~ 05

Room for improvementbull Better laserjet time overlap (laser beam size =gt 110 atoms) bull Better de Laval Nozzle

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 17: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 17In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Optimization in HELIOS KU Leuven

Geometric efficiency ~4

x 10-4

57837 nm3d94p 2Pdeg

12 30535302 cm-1

Cu3d104s 2S12 0000 cm-1

3d94s2 2D32 13245423 cm-1

32749 nm

t = 72 ns12 branch

1 mm

55 mm

Solid angle 039

Laser sheet

CCD Camera

Lens

Narrow bandwidth laser beam

Not to scale

Filter

bull Gas cell Inlet Homogeneous flowbull Entrance window Accept full beambull De Laval nozzle Uniform quasi-parallel

supersonic jet Visualization of the gas jet (PLIF) Planar Laser

Induced Fluoresecence

bull Local temp density velocity jet divergence

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 18: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 18In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 19: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 19In gas-jet isomer selective laser ion source Nathalie Lecesne

S3 SPIRAL2

R Ferrer LAP 2015 East Lansing July 7-11 2015

IGLIS set up S3 (SPIRAL2-GANIL)

bull Wide range (H to U) of primary beams at high intensity bull High primary beam rejection and high acceptance spectrometer

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 20: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 20In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Rare Elements in-Gas Laser Ion Source and Spectroscopy (REGLIS)

REGLIS3 SPIRAL2

R Ferrer et al NIM B 317 (2013) 570

R Ferrer LAP 2015 East Lansing July 7-11 2015

(Gas cell) (RFQs)(Gas cell laser system)

(mr-TOF-ms laser systeminfractructure safety RFQsdetectors)

REGLIS3 SPIRAL2

l12l2 l1

towards DESIR

in-gas-cellionization

EVRsNeutralized EVRsPhotoions

in-gas-jetionization

gas cell S-shape RFQdiff pumping RFQ

QMF (mDm ~ 100) buncher

MR ToF MS (mDm ~ 105)

MCP

bender

10-2 mbar 10-3 - 210-5 mbar 10-8 mbar

200 - 500 mbar Ar

from S3

bull Two laser systemsbull Solid states TiSa laser

(GANIL JYU JGU)bull Dye laser sytem

(KU Leuven)

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 21: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 21In gas-jet isomer selective laser ion source Nathalie Lecesne

REGLIS3 SPIRAL2 94Ag

High-spin isomerism (J=21+)b b-delayed p 1p- and 2-p emission

107-101SnTest validity of shell-model predictions Single particle character and level of collectivity

VHE (Z ~ 89 - 102) Nuclear properties deformation shape coexistence Atomic properties transition energies and strengths ionization potentials

80Zr Shape coexistence and single- particle behavior

RIBs REGLIS

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 22: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 22In gas-jet isomer selective laser ion source Nathalie Lecesne

diams In-gas laser spectroscopy on neutron deficient Ac isotopes

diams In-gas jet laser ionization spectroscopy proven Good efficiency (~ 5 duty factor corrected) Good spectral resolution

diams Off line characterization and optimization of the jet HELIOS lab in KU Leuven

diams Future application at REGLIS3 SPIRAL2 Precision laser spectroscopy measurements of neutron

deficient isotopes produced and pre-selected by S3

High purity isomeric beams production

Conclusion and outlook

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 23: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 23In gas-jet isomer selective laser ion source Nathalie Lecesne

JYFL University of Jyvaumlskylauml I Moore V Sonnenschein

GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S

Franchoo L Hijazi N Lecesne R Leroy H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov

RILIS-ISOLDE S Rothe TRIUMF J Lassen A Teigelhoumlfer

University of Mainz R Heinke T Kron P Naubereit P Schoumlnberg K Wendt

Acknowledgments

AND THANK YOU ALL FOR YOUR ATTENTION

GSI M Block M Laatiaoui S Raeder

KU Leuven Instituut voor Kern- en Stralingsfysica BelgiumP Creemers R Ferrer LP Gaffney L Ghys C Granados M Huyse

Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen A Zadvornaya

Collaboration

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 24: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

front-end vacuum chamber- gas cell- RFQ ion guidespumping system

beam diagnostics

dipole magnetmeasurin

g station

beam optics

HELIOS Project KU Leuven

Investigate jet properties with CD nozzle Optimize gas cell design Test new laser systemPoster 38 Yu Kudryavtsev

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 25: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 25In gas-jet isomer selective laser ion source Nathalie Lecesne

In gas cell and In gas jet ionization

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 26: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

Production amp First Spectroscopy of Ac

212-215Ac

K Blaum J Dilling W Noerterhaeurser Phys Scr T152 (2013) 014017

etotal~1

IP 4339445 cm-1

2D32

4P52

418312 nm

43921 nm

gs

continuum

2389886 cm-1

466606 cm-1

J Rossnagel et al PRA 85 (2012) 012525

197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac

0

50

100

150

238990 238995 239000 239005 239010 239015 239020 239025

0

25

50

75

100 213Ac

212Ac

Alp

ha c

ount

s in

100

s

Wavenumbers (cm-1)

X

2D32

4P32 52

43858 nm

4347 nm

gs

continuum

22801 1cm-1

46810cm-1

IP 4339445 cm-1

228010 228015 228020 228025 228030 228035 228040 228045 228050

50

100

150

200

Alp

ha c

ounts

in 2

00 s

Wavenumbers (cm-1)

212Ac T12

= 920 ms I= (6+)

R Ferrer LAP 2015 East Lansing July 7-11 2015

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 27: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 27In gas-jet isomer selective laser ion source Nathalie Lecesne

Off-Line Free jet ionization at LISOL

Tisa

λ-me

ter

gas cell

RFQ

filament

acceloptics

dipole magnet

tape station

collector plates

SEM

SHG

Nd

YA

G

Dio

de

Tisa

ionization volume

Dye

Dye

Excim

er

Rep rate 200 Hz

Gas cell90deg bent RFQ

LASER 2

LASER 1

Shaped rod segments

Towards extraction RFQ

bull Narrow band width laser (88MHz)

bull Doppler shift 1830(30)MHzbull Doppler FWHM = 450MHz Divergence of the jetYu Kudryavtsev et al NIM B 297 (2013) 7

Argon 200 mbar

RefCell

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 28: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

000

003

006

009

012

0

1000

2000

3000

4000

-20 -10 0 10 20

0

100

200

300

Ion

sign

al (

arb

u)

Ref cell

Gas cell

Gas jet (LIST)

- 915 42395 (GHz)

Free jet laser ionization at JYFL

63Cu

Vjet ~1040 msFWHM = 39 GHz

FWHM = 67 GHz

FWHM = 18 GHz

Laser linewidth dominated

He 180 mbar

ID Moore et al NIMB 317 (2013) 208

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 29: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

bull Observed spectral widths jet T and jet divergence and laser power

bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution

In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)

y (m

m)

X (mm)

y (m

m)

Improve temporal overlap to increase efficiency 110 to 1010

Design of a better nozzle and characterization of gas jets Jet visualization by PLIF

In-jet spectroscopy results in

bull 25-fold improvement in uncertainties of istope shifts and magnetic hf param A

bull access to quadrupole moments as well

2280298 2280300 2280302 2280304 22803060

25

50

75

Alph

a co

unts

in 5

0 s

Wavenumbers (cm-1)

hfs triplet in 214Ac

R Ferrer LAP 2015 East Lansing July 7-11 2015

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 30: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

Broadening of atomic transitions (I)

Power broadening

bull For RIB production we want optimum efficiencybull For spectroscopy we trade efficiency for spectroscopic resolution

ID Moore Advanced School on Laser Applications at Accelerators Sept ndash Oct 2014

Natural linewidth135 MHz

Γ 119901119900119908119890119903=Γ119899119886119905 radic1+ 119868119868 119904119886119905

V Sonnenschein ID Moore et al EPJA 48 (2012) 52

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 31: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

N=50 92Mo(14N ndash 130 MeV2pxn)104minusxAg

64natZn(36Ar ndash 125 MeVpxn)101minusxAg

In-Gas-Cell Laser Spectroscopy of Ag

count rates 101Ag=23 pps 97Ag=09 pps etotal~2

R Ferrer PALIS Workshop Spring 2014

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 32: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 32In gas-jet isomer selective laser ion source Nathalie Lecesne

Dye lasers vs TiSa lasers

Dye lasers 200 ndash 850nm TiSa lasers 200 ndash 500n amp 700 ndash 1000nm

Solid State CrFosterite lasers Fundamental = 1150 ndash 1350 nm

(U Mainz TRIUMF) Doubled = 575 ndash 675 nm

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 33: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 33In gas-jet isomer selective laser ion source Nathalie Lecesne

Reaction products (neutral)

Ions

Primary beam

Target material

Ion source ExtractorTarget

60 kV

Towards mass separator

LaserIonization chamber

LaserIonization chamber

Laser beams

Transverse SPIG

ArHe from gas purifier

Ion Collector

Ionizationchamber

Filament

Beam from

Cyclotron

Ion collector

500 mbar

Target

Exit hole Oslash 05 ndash 1 mm

Laser beams

Longitudinal

Kudryavtsev et al NIMB 267 (2009)Sonoda et al NIMB 267 (2009)

Hot cavity In Gas cell In Gas jet

Typical residence time 10micros 25 - 100ms 10micros

Laser system frequency 10kHz 200Hz 10kHz

Doppler broadening 2500K Pressure Broadening

~5 GHz ~6 GHz ~200 MHz

Residence time of atoms to compensate duty cycle

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 34: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

ICIS 2015 August 23th -28th 2015 New York 34In gas-jet isomer selective laser ion source Nathalie Lecesne

diams Pressure Shift and Broadening

-20 -15 -10 -05 00 05 10

00

02

04

06

08

10

p (mbar) = 100 150 200 300 400 500 ref cell

Cur

rent

on

SE

M (ar

b u

)

Wavelength - 3925705 cm-1 (cm-1)

1

gbr =32(4) MHzmbargsh = -40(03) MHzmbar

bull Large pressure broadening coefficient for λ1

bull Not possible Hyperfine Structure measurements (FWHM~15GHz)

2002 2003 2004 2005 2006 2007 2008 2009

00

02

04

06

08

10

Cur

rent

on

SE

M (

arb

u)

Wavelength - 5923269 cm-1 (cm-1)

2

gbr =210(25) MHzmbargsh = 150(10) MHzmbar

R Ferrer et al NIMB 317 (2013) 570

Limitations of gas cell

Sn

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 35: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

Fast piezo mirror

Fast-switchedphotodiodeamplifier

Tisapphire crystal

d = n λcw

Lock-in Amplifier(TEM Laselock)

PSD

HVout

InputCW seed laser1-100 mWMatisse TS Tisa(100 kHz linewidth)

Outputpulsed (10 kHz) 30 ns width3-5 W average power20 MHz linewidth(reduction factor of 200)

pump laser10-20 W 10 kHz

Development of suitable laser technology for gas-jet spectroscopy

V Sonnenschein PhD thesis University of Jyvaumlskylauml (2015)

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36
Page 36: ICIS 2015, August 23 th -28 th, 2015, New York 1 In gas-jet isomer selective laser ion source Nathalie Lecesne In Gas-Jet Isomer Selective Laser Ion Source.

Proof of principal spectroscopy on Cu

FL=2

FU=1FU=2

FL=112 GHz

7 GHz

Injection-locked Tisa laser (linewidth 20 MHz)

FWHM = 65 MHz

FWHM = 20 GHz

rdquoStandardrdquo Tisa laser (linewidth 1GHz)

V Sonnenschein IM et al Hyp Int 227 (2014) 113

ID Moore International Scientific Meeting on Nuclear Physics Rabida 15 June 1-5 2015

Cu is a lighter mass element which exhibits a large HFS This allowedcharacterization of the new laser on 6365Cu in crossed beams RIS

  • Slide 1
  • The nuclear physicist playground
  • RILIS from radioactive ions production hellip
  • hellipTo nuclear properties via laser spectroscopy
  • hellipTo nuclear properties via laser spectroscopy (2)
  • In-Gas Laser Ionization and spectroscopy
  • In Gas Cell Spectroscopy on Ac
  • Limitations of gas cell
  • Limitations of the gas cell
  • Reduction of spectral Bandwidth
  • Reduction of spectral Bandwidth (2)
  • Reduction of jet divergence
  • On-Line Gas-jet ionization at LISOL
  • On-Line Gas-jet ionization at LISOL (2)
  • On-Line Gas-jet ionization at LISOL (3)
  • On-Line Gas-jet ionization at LISOL (4)
  • Off-Line Optimization in HELIOS KU Leuven
  • IGLIS set up S3 (SPIRAL2-GANIL)
  • IGLIS set up S3 (SPIRAL2-GANIL) (2)
  • REGLIS3 SPIRAL2
  • RIBs REGLIS
  • Conclusion and outlook
  • Acknowledgments
  • Slide 24
  • In gas cell and In gas jet ionization
  • Slide 26
  • Off-Line Free jet ionization at LISOL
  • Slide 28
  • Slide 29
  • Slide 30
  • Slide 31
  • Dye lasers vs TiSa lasers
  • Residence time of atoms to compensate duty cycle
  • Limitations of gas cell (2)
  • Slide 35
  • Slide 36