CERN ISOLDEThe Isotopes Separator Online DEviceElisa Rapisarda, CERN, PH Division

The Nuclear Chart

82

50

20

126

50

28 82

2028

8

8

stableb+ decayb- decaya decayp decayfissionpredictedClosed Shells

atoms: noble gasnuclei: magic numbers

system

periodic

2820

50

126

82

50

2820

8

8

Production of Radioactive Ion beams

• Nuclear Reaction: proton (1.4 GeV) + 238U (1012 atomen per seconde)• Purification:

• Separation in mass number (A)• Separation in proton numbers/ element (Z): lasers

• Transport of the ion beam (sometimes 1 atom per second) to the measurement setup

• Acceleration in order to induce a new Nuclear Reaction

ISOLDE @ CERN• It all starts with a bottle of hydrogen …

ISOLDE @ CERN… followed by the LINAC2 …

ISOLDE @ CERN … and the 4 rings of the PSBooster

ISOLDE targetsService Robots

ISOLDE targetIn position

ISOLDE targetProton on target or on the neutron converter

Research with Radioactive Beams Why?

Biology

v

Quark

s, lep

tone

n <10

-19 cm

Hadronen <10-13 cm

Kernen <10-12 cm

Gevangen atomen 10 -8 cm

10-3

cm G

emer

kte

cel

Kanalisatie 10 -7 cm102 cm

Gen

eesk

unde

106 cm AMS in het klimaat 1011 cm De zon

10 18 cm Supernova

10 22 cm Sterrenstelsels

0=>1028 cm

Oerknal

Particle physics(standaard model)

Nuclear Physics

atomic Physics

Medicine

Climate

Energy

Astrophysics

cosmology

Solid State Physics

Existence of the elements

Laser spectroscopieCollaps - CRIS

HIE-ISOLDE-acceleration (REX)

MINIBALL

WITCH: fundamental interaction

Solid State Research

MEDICIS

CERN ISOLDE Isotope Separator On-Line DEvice

IDS: Decay study

b-spectroscopy: Previuos Experimental Setup

Annular Si Si

pure 30 keV Tl beam from RILIS+ISOLDEIntensity = 104 pps

C-foils20 mg/cm2

Si detectors

SiAnnular Si

ff

ff

a

30 keV beam from ISOLDE

C-foil

Ge detector #1

Windmill Chamber

Courtesy of T.E.Cocolios

Possible Projects

AUTOCAD technical drawing of the new beam line and the experimental area

Beam optical simulations of the latest part of the beam line(Switchyard + three quadrupoles) (MADX and Simion software)

Ongoing work in coming months: Install detectors frame (hands on)

Install an automatic Refill system of Liquid Nitrogen for the Germanium detectors (hands on)

Test Germanium detectors (set up a simple 1-channel data acquition system)

Commission Tape station and ancillary detectors (hands on)

Team: you will join a small group of 3 to 5 persons (locally 2 Senior Post-Doc, 1 PhD student)

goal: be ready for first decay experiment end July 2014

• Installation of the apparatus started in Feb 2014• Beam line modification is going on;