1 / 23

RIB production with SPIRAL 2

C. D. 1+. n+. UCx. IS. ECR. RIB production with SPIRAL 2. Versatile and evolutive Fission fragments with D beam Goal > 10 13 fissions/s fusion-evaporation with heavy ions Basic configuration :

niel
Download Presentation

RIB production with SPIRAL 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. C D 1+ n+ UCx IS ECR RIB production with SPIRAL 2 Versatile and evolutive Fission fragments with D beam Goal > 1013 fissions/sfusion-evaporation with heavy ions Basic configuration :  Fission fragments produced by n-induced fission Converter d-n with a carbon wheel UCx fissile target - low or high density (Gatchina) Possibility to couple different ions sources (1+) 1+/n+ (charge breeder) approach Rencontre de Moriond, 17-22 March

  2. n d UCx d,3,4He,... UCx Fission yields with converter ... 4.5 mA 1013 f/s=2.3g/cm2 V=240cm3 5 mA 5.1013 f/s=11g/cm2 V=240cm3 5 mA 2.1014 f/s=11g/cm2 V=1000cm36kW (limit) Fission of 239U Ex= 20 MeV 40 MeV deuteron, 5 mA  200 kW dissipation in the converter without converter ... 0.15mA 5.1012 f/s6kW Fission of 240Pu,... Ex≥ 50 MeV acces to a wider mass region Rencontre de Moriond, 17-22 March

  3. Fission yields (low density and with converter) d (40 MeV, 4.3 mA) + C + UC (2.3 g/cm3, 363 g) on target x 10-2 - 10-3 towards experiment Rencontre de Moriond, 17-22 March

  4. Example : production from D beam  Sn isotopes D 4 mA on C with UCx lowdensity target (1013 fissions/s). UCx target IS Efficiencies for Sn isotopesM.G. Saint-Laurent T1/2 (s)Diff.Eff.-tEff.-tube1+1+/n+ Acc. Total 132 40 0.31 0.83 0.99 0.3 0.04 0.5 1.5e-3 133 1.4 0.065 0.16 0.86 0.3 0.04 0.5 5.4e-5 Rencontre de Moriond, 17-22 March

  5. p,d,…,HI Thick target Thin target HI separator Production from Heavy Ion Beams Primary Heavy Ion beams at 14.5 A.MeV of 1 mA, up to Ar  neutron deficient RIB Fusion-evaporation and transfer reactions residues produced by thick target method (like ISOL@GSI) example 58Ni + 50Cr 100Sn 1+~1 pps Spectroscopy of N=Z A≈100  neutron rich RIB Fusion-evaporation residues produced by thin target method (In-Flight) example 28Ni + 58Mg 80Zr 1+~ 3 x 104 pps Rencontre de Moriond, 17-22 March

  6. 3. N=Z 5. Transfermiums In-flight (Z=106, 108) 4. Fusion reaction with exotic beam Regions of the nuclear chart covered by ... 1. Fission products 2. High Ex fission products Rencontre de Moriond, 17-22 March

  7. Target & Ion Source : the Plug solution rotating C wheel 2 m concrete  dose rate < 7.5 Sv/h primary beam (deuterons) Plug housing C converter and UCx target dose rate 32 Sv/h at 1 m and 34 mSv/h after 1 year exotic beam Rencontre de Moriond, 17-22 March

  8. Detail of the rotating wheel UC2 target Ti support R = 385 mm Beam size: 10 x 25 mm Carbon « standard » First study Rencontre de Moriond, 17-22 March

  9. DRIVER 14.5 A.MeV ions 40 MeV deuterons Source Injector Linear accelerator • Must be an evolutive and versatile machine • Optimised for q/A=1/3 ions and must accelerate D+(q/A=1/2) • No stripper, to make a direct profit of the ECR sources evolutions for heavy ions, as far as beam energy is concerned • 1mA for ions (up to Argon) and 5 mA for deuterons • Injector: RFQ with a 100% Duty Cycle Exit Energy: 0.75 A.MeV - 1.5 A.MeV (according to the frequency) • LINAC: Independant Phase Superconducting Cavities based on QWRs and/or HWRs up to 40 MeV or 14.5 A.MeV Frequency : 88 MHz and 176 MHz or 176 MHz for the whole linac gradient ~ 6-8 MV/m ( = Vacc /   ) ~ 30-40 resonators Rencontre de Moriond, 17-22 March

  10. Main driver components Deuteron Source ex. SILHI-type(permanent magnets) QWR Argonne example of ACCEL cryostat(4 cavities, 2 solenoids) SC Solenoid + steering coils+ active screening RFQ (Cu plated SS version) Rencontre de Moriond, 17-22 March

  11. SERSE at LNS (14-18 GHz) PHOENIX (28 GHz) Primary Sources R&D  deuterons (5 mA) : “downgrade” of SILHI source or micro-phoenix or ...  heavy ions q/A=1/3 (1 mA) cw mode, voltage = 60 kV,  < 200  mm mrad state-of-the-art : 18O6+ 1 mA 36Ar12+ 0.2 mA  High Frequency & high B 1. A fully superconducting ECRIS (close to the GYROSERSE project) Bmax = 4 T; Brad = 3 T; large ECR zone, F = 28 GHz, and possibly above 2. A compact source, with lower magnetic field & higher power density (A-PHOENIX) technology based on HTS coils and permanent magnets Bmax = 3 T; Brad= 1.6 T Rencontre de Moriond, 17-22 March

  12. Low Energy Beam Transfer (LEBT) Goal : to transport and to match and 2 types of beam to RFQ with very low loss energy : 20keV/n D+ (5 mA, 40kV)q/A=1/3 (1mA, 60kV) Rencontre de Moriond, 17-22 March

  13. Linac architecture • Beam Dynamics studies determine the optimal choice of • linac frequency • resonator types • transition energies (RFQ output, geometric betas) • Nb of resonators / cryostat, etc ... and should also accelerate heavier ions (q/A~1/6) 2 options : 88/176 MHz or 176 MHz for the whole linac pro’s and con’s 88 MHz requires QWRs  easier fabrication and cleaning but dipole fields only partially compensated 176 MHz only  only HWRs could be used but more dissipation in the RFQ, requires higher RFQ output energy Rencontre de Moriond, 17-22 March

  14. Different technological solutions for the RFQ 4-rod RFQ, IH-type RFQ cheaper but low-frequency IAP Frankfurt 4-vane RFQ cw operation & high transmission classical brazed Cu 88 or 176 MHz Cu plated SS 88 MHz separated functions 88 MHz with rf joints 88 or 176 MHz Rencontre de Moriond, 17-22 March

  15. Phase space at the RFQ output Ex.88 MHz 4-vane Length = 5m Energy = 0.75 A.MeV aperture = 8 - 10 mm vane voltage = 100-113 kVModulation 1-2 Transmission99,95% (1/2) 99,93% (1/3) 1/3 1/2 Rencontre de Moriond, 17-22 March

  16. Resonators Legnaro-typeQWR Argonne_type QWR and HWR(with field asymmetry compensation) ~ 40 resonators at 6 MV/m ~ 30 resonators at 8 MV/m Rencontre de Moriond, 17-22 March

  17. Beam dynamics in the SC linac • 2 essential rules to avoid dilution + beam loss : • phase advance < 90° • long. & trans. matching between tanks •  favours large Nb cavities / tank • solenoid instead of quad focusing • 1 solenoid / cavity at low energy to keep • the beam size < the cavity aperture (30 mm max) • Bz < 7-8 T to keep • classical technology • NbTi SC solenoid phase advance too large ! Rencontre de Moriond, 17-22 March

  18. Schematic lay-out (1) RFQ CIME Q/A= 1/3ion source DeuteronSource Separator charge breeder 1+ / N+ SC LINAC Fission fragments <6 MeV/nucléon Deuteron 40 MeV Heavy ions 15 MeV/u Low energy RIB Target-Sourcesystem Rencontre de Moriond, 17-22 March

  19. Schematic lay-out (2) post-accelerator CIME Low energy RIB stable heavy ions Injection to CIME ECR Sources(d and q/A=1/3 ions) SC LINAC 40 MeV and 14.5AMeV RFQ F. Daudin Rencontre de Moriond, 17-22 March

  20. GANIL expansion Rencontre de Moriond, 17-22 March

  21. Time schedule APD ~ 2 years Nov 2004 Rencontre de Moriond, 17-22 March

  22. Long-term future (1) can be used as a post-accelerator with future upgrade in energy Driver light (heavy) ions Energy upgrade SPIRAL 2 Rencontre de Moriond, 17-22 March

  23. Long-term future (2) or can be used as the low energy part of a future high energy driver postaccelerator production Energy upgrade SPIRAL 2 Rencontre de Moriond, 17-22 March

More Related