Improved Analysis of Petroleum Isomer Distribution in Jet Fuel Using Cold EI GC/MS
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Transcript of ICIS 2015, August 23 th -28 th, 2015, New York 1 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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-