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DEVELOPMENT STATUS OF GANIL ION SOURCE: GISELE

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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  1. 1st Topical Workshop on Laser Based Particle Sources CERN, 20th February 2013 DEVELOPMENT STATUS OF GANIL ION SOURCE: GISELE Jose Luis Henares henares@ganil.fr

  2. 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

  3. 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.

  4. 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!

  5. 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

  6. 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%

  7. RILIS AT SPIRAL2 RILIS: 60% of the Letters of Intent for SPIRAL2 Phase 2 ECR 1er requested beams: Sn, Zn, Ga, Y, In

  8. 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

  9. 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

  10. 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)

  11. 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

  12. ON LINE RILIS AT SPIRAL2 Production module Ionization tube Laser beams UCxTarjet Extrationelectrode

  13. 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

  14. 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)

  15. 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

  16. 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.

  17. Thankyou!

  18. 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

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