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1 st Topical Workshop on Laser Based Particle Sources. CERN, 20 th February 2013. DEVELOPMENT STATUS OF GANIL ION SOURCE: GISELE. Jose Luis Henares henares@ganil.fr. INDEX. SPIRAL2 FACILITY RILIS AT SPIRAL2 TEST BENCH SOURCE FOR SPIRAL2: GISELE GISELE LASER SETUP

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DEVELOPMENT STATUS OF GANIL ION SOURCE: GISELE


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Presentation Transcript
index
INDEX
  • SPIRAL2 FACILITY
  • RILIS AT SPIRAL2
  • TEST BENCH SOURCE FOR SPIRAL2: GISELE
    • GISELE LASER SETUP
    • LISBET TEST ION SOURCE
  • DEVELOPMENTS
    • LOW WORK FUNCTION MATERIALS
    • TIME PROFILE MEASUREMENTS
    • IONIZATION SCHEMES
  • SUMMARY & OUTLOOK
spiral2 facility
SPIRAL2 FACILITY

CIME cyclotron RIB at 1-20 AMeV (up to 9 AMeV for FF)

Phase 1

Phase 2

LINAC: 33MeV p

40 MeVd

14.5 A MeV HI

RIB Production Cave

Up to 1014fiss./sec.

spiral2 facility1
SPIRAL2 FACILITY

Ionization

Production

ISOL: Isotope Separation On Line

C

238U

2H

X+

kV

Separation

Experiment

Charge Breeding

X+  Xn+

  • Post acceleration

Q/A

RIBs: Short T1/2, Rare, All but Pure  Fast, Efficient, Universal & Selective!

spiral2 facility2

E0

SPIRAL2 FACILITY

Ion +

  • Surface Ion Source
  • Plasma Ion Source
  • ResonantIonization Laser Ion Source (RILIS)
  • ResonantIonization Laser Ion Source (RILIS)

Ionization

Potential

EIP

E2

Excited

states

FEBIAD

ECR

Energy

E1

At

0 eV

A = 78

rilis at spiral2
RILIS AT SPIRAL2

HOT CAVITY SOURCE

CHARACTERISTICS:

  • Typical residence time: 10µs
  • Laser system frequency: 10kHz
  • Doppler broadening @ 2500K: ~5 GHz
  • + ion~10%, up to 40%
  • + Ionization process is chemically selective
  • - Contamination by surface ions

Target

Extractor

Ion source

Towards mass separator

60 kV

surf

~ 0.1%

100%

rilis at spiral21
RILIS AT SPIRAL2

RILIS: 60% of the Letters of Intent for SPIRAL2 Phase 2

ECR

1er requested beams: Sn, Zn, Ga, Y, In

test bench source gisele
TEST BENCH SOURCE: GISELE

SCHEME:

Pump laser

Nd:YAG

75 W, 10 kHz

Laser system

Ion Source

Sample

Tube

-

Mass spectrometer

Ti:Sa 3

Ti:Sa 2

Ti:Sa 1

x 3

n

Dipole

Oven

kV

Window

Extraction

electrode

n

x 2

test bench source gisele1
TEST BENCH SOURCE: GISELE

Laser beam transport, Separator & Ion Source

Laser setup

Dipole

Ion Source

Ti:Sa Lasers

SHG/THG/FHG

Zn+

Ion Beam

Pump Laser

gisele laser setup
GISELE LASER SETUP

LASER PUMP

Nd:YAG 532nm

120ns, 5-20kHz, 75W @ 10kHz

PhotonicsIndustry

3 TUNABLE TI:SA CAVITIES

680 <  < 1000nm

Max power ~ 5W (40ns, 10kHz)

Spectral bandwidth~ 6 GHz

TRIUMF Collaboration (Vancouver, Canada)

2 FREQ. CONVERSION CAVITIES

SHG: 350 <  < 470nm (~1W)

THG/FHG: 210 <  < 330nm (~200mW)

Mainz University Collaboration (Germany)

gisele laser setup1
GISELE LASER SETUP

Zn+ Beam & Ga Beam

90000 cm-1

70000 cm-1

?

50000 cm-1

3d104s4p 1P°

30000 cm-1

Zn

June 2012

On going:

New ionization scheme for Zn

Test of 2 & 3 step Sn scheme

213nm

10000 cm-1

3d104s2 1S

on line rilis at spiral2
ON LINE RILIS AT SPIRAL2

Production module

Ionization tube

Laser beams

UCxTarjet

Extrationelectrode

laser ion source test for spiral2
LASER ION SOURCE TEST FOR SPIRAL2

LISBET: Laser Ion Source Body using Efficient Techniques

Ionizationtube

-

+

-

Transfer

tube

Extractionelectrode

Shielding

+

Zn & Sn ionization efficiency

Elbow shape source

New ceramic ionization tube

Electric field to reduce “impurities”

Reservoir

low work function study
LOW WORK FUNCTION STUDY

REDUCTION OF CONTAMINANTS

Low work function materials  Reduce surface ionization of isobars & molecular sidebands

POSSIBLITIES:

  • Metallic
  • Carbides
  • Borides
  • Impregnations

New low work function materials: Carbides

ZrC, TaC, HfC, TiC (Tm ~3500ºC)

time profile measurements
TIME PROFILE MEASUREMENTS

MEASUREMENT SETUP

TNT2 Card

Lettry, Review of Scientific Instruments. Vol 69, Number 2. February 1998.

Liu, Nuclear Instruments and Methods in Physics Research B 269 (2011) 2771–2780

summary outlook
SUMMARY & OUTLOOK
  • New SPIRAL2 have been presented.
  • Test bench source is in development: GISELE & LISBET.
  • Low work function materials will be studied.
  • Time domain profile of the beam will be measured.
  • New ionization schemes will be developed.
spiral2 facility ganil
SPIRAL2 FACILITY (GANIL)

2012: > 3500 over 8000 nuclei have been observed

SHE

In-flight S3

N=Z: SPIRAL2

S3 & Phase 2

In-flight S3

SPIRAL2 Phase 2

Fission products

SPIRAL1

New RIB !

ISOL & in-flight RIB from transfer and

deep inelastic Reactions