The SPIRAL 2 Project at GANIL

Transcription

1 Primary heavy ion beam accelerator:100 MeV/u Cascade of 3 cyclotrons Secondary beam accelerator: CIME Cyclotron OUTLINE Ganil: Stable and RI Beam Facility Sissi: in flight fragmentation Spiral : Isol + Post acceleration Spiral 2 principle Spiral 2 layout Spiral 2 Milestones Linear accelerator and prototypes Spiral2 project Intermediate step between existing RIB facilities, and future projects like EURISOL or RIA. Status/Conclusions The SPIRAL 2 Project at GANIL SRF Ithaca, July 15th 1/17

2 200 kw Spiral2 principle Uranium Carbide Target (6 kw max) fissions/s (low/high density) SRF Ithaca, July 15th 2/17

3 Spiral2 principle SRF Ithaca, July 15th 3/17

4 Spiral2 principle primary beam: deuterons heavy ions 5. Superheavies Z 6. N=Z ISOL & In-Flight 3. Transfermiums Spiral 2. Fusion reaction with exotic beam1 7. High Intensity Light RIB 1. Fission products (w/ converter) 4. High Ex fission products (w/o converter) N SRF Ithaca, July 15th 4/17

5 Experimental hall Stable heavy ions Spiral2 layout Charge breeder Mass separator Deuteron source Accelerator Building Existing GANIL experimental area CIME cyclotron Low Energy RIB cave transport towards LIRAT Irradiation area Baseline project Included options Existing entities Cables connectors Direct lines to G1/G2 caves Vacuum pump motors Transfer line to CIME RIB production station Converter-target-ion source Production Building Optics Ion source Target Converter Superconducting Linac RFQ Ion source q/a=1/3 SRF Ithaca, July 15th 5/17

6 Project Milestones : Conceptual design at GANIL of a future facility for high intensity rare beams using a sc linac to accelerate medium mass ions at 100 MeV/n: LINAG : LINAG Phase 1: low energy, high intensity deuteron beam to obtain neutron-induced fission considered as an option for the SPIRAL 2 project, and chosen in alternative to photofission : SPIRAL 2 DD : Participation of most of French Labs to the detailed study coordinated by A. Mosnier (Spiral2 collaboration) : Construction approved in May 2005, Project leader named in July: M. Jacquemet First beam expected in 5 years. SRF Ithaca, July 15th 6/17

7 Linear Accelerator Specifications CW machine Two ion sources, one for deuterons, the other one for ions q/a=1/3 KEPT POSSIBILITIES for future upgrade: To increase the ion energy to 100 MeV/u Beam currents Ions: up to 1 ma (Argon) Deuterons: up to 5 ma To accelerate ion beams of q/a=1/6 (up to 1 ma) in a second step Beam energy: Ions : 14.5 MeV/u Deuterons: 20 MeV/u To add a fast chopper placed in the MEBT, with the ability of selecting from 1/50 to 1/10 5 bunch (bunch isolator) Maximum energy gain for each kind of ion (implies independently phased cavities) Optimisation of the accelerator for q/a=1/3, in order to have the possibility to increase the ion energy in the future SRF Ithaca, July 15th 7/17

8 Linear Accelerator 0 10 m 20 m 30 m 40 m 50 m Sources+LEBT RFQ 88MHz MEBT QWR 88MHz β=0.07 QWR 88 MHz β=0.12 RFQ 2 source D + RFQ MeV/u Β= mod x 1cav 7 to 9 mod x 2cav ion sources (1/3,1/6) Eacc max 6.5 MV/m SRF Ithaca, July 15th 8/17

9 Linear Accelerator: SC Linac MHz QWR with no steering effect compensation Short cryostats (1 or 2 cavities) Normal conducting Qpoles 20 kw Solid state amplifiers Digital LLRF SRF Ithaca, July 15th 9/17

10 16O 6+ SRF Ithaca, July 15th SILHI like source: D+ measured emittance: 0.1 π.mm.mrad E m ittance V E m ittance H 1 m A e 6 0 K V ε H & V < 0.4 π.m m.m rad E y nor m =0.2 6 π.m m.m ra d E x n orm =0.18 π.m m.m ra d S PIR A L II nom inal b ea m for PH O E N I X 2 8 G H z : high cu rrent extraction (O x) design emittance:0.4 π.mm.mrad Phoenix ion source MHz 113 kv 40 kw Linear Accelerator: Prototypes 10/17

11 QWRs Manufacturing of 1 prototype of each beta family tested in Nov.2004-June.2005 MoP02 by G. Devanz Linear Accelerator: Prototypes 1,0E+10 1,0E+09 * Qo 1,0E+08 1,0E Eacc (MV/m) SRF Ithaca, July 15th 11/17

12 Linear Accelerator: Prototypes SPIRAL-2 QWR 88 MHz (beta 0.12) K (February 2005) 1,0E+11 1,0E+10 Qo 1,0E+09 * Light Field Em ission 1,0E+08 Multipacting Spiral-2 operating gradient E acc max = 11 MV/m (B peak = 110 mt) (E peak = 60 MV/m) , Eacc (MV/m) High beta cavity prototype Using for the first time in SC QWR A SC magnetic plunger as tuner TuP37 G. Olry, J-L. Biarrotte, S. Blivet, S. Bousson, C. Commeaux, C. Joly, T. Junquera, J. Lesrel, E. Roy, H. Saugnac, P.Szott, B. Legoff * CNRS/IN2P3/IPNO, Orsay, France SRF Ithaca, July 15th 12/17

13 SRF Ithaca, July 15th ThA04 by T. Garvey 40 kw test bench being assembled at LPSC Grenoble Disk window Cylindrical window 15 kw fix coupler prototypes Linear Accelerator: Prototypes 13/17

14 Linear Accelerator: Prototypes 1 kw solid state amplifier prototype 500 W reflected power accepted Limited by 1.1 KW heat radiation capability, 20 kw, variable VSWR test bench being assembled at Ganil SRF Ithaca, July 15th 14/17

15 Status/Conclusions ACCELERATOR: - Single device design study well advanced - Design, manufacture and tests of the cryostats in the next 2 years PRODUCTION BUILDING AND MAINTENANCE EQUIPEMENT: - Conceptual design finished - Contract with a nuclear engineering company detailed studies of the whole maintenance equipement (hot cell, storage, ventilation ) and building (cost, ) - Contract started on March; results expected in 10 months RADIOACTIVE ION BEAM TRANSPORT LINES: - continuation of the optical design of the lines and separators SRF Ithaca, July 15th 15/17

16 Acknowledgements G.Auger, W. Mittig, A.C. Villari and M.H. Moscatello: project fathers and mother Many colleagues from all the following laboratories (Spiral 2 collaboration) participate to the work I ve presented: CEA/DAPNIA/SACM,SIS CEA/DPTA CNRS/IN2P3/IPNO, IRES, LPC Caen, LPSC, CENBG, CSNSM GANIL- CEA/CNRS, INFN/LNL, Gatchina, Bucarest Special thanks to Argonne and Triumf labs for all fruitful discussions Spiral2 project is opened to international collaboration SRF Ithaca, July 15th 16/17

17 Courtesy of G. Devanz SRF Ithaca, July 15th 17/17..Thank you for your attention Cornell University proposed collaboration: the linac tunnel Status/Conclusions

18 Annexes SRF Ithaca, July 15th 18/17

19 Target/Ion source production system Tantalium oven Transfert tube(ta) Cables connectors Vacuum pump motors UCx target Graphite container Cooled chamber converter Optics Ion source Target Uranium pellets SRF Ithaca, July 15th 19/17

20 Safety aspects Rather straight forward for the driver (losses <1W/m in the SC linac) Becquerel in the high density Ucx target Extraction Line + Separator + Charge-breeder in hard radiation environment in the production hall Studies subcontracted to Nuclear engineering companies to find appropriate solutions allowing maintenance w/o personnel exposure to radiation, w/o dissemination of nuclear matter presently, extra-cost not precisely known Studies to purify the beams upstream in progress Wings at 20K Wings at 80K He or H tank Liquid N tank in order to transport only the elements of interest increase the selectivity of the ion sources use of cryotraps to stop radioactive gases in the beam lines resolution enhancement of the cyclotron CIME (a few 10-4 ) use of RF deflectors (selection of ±10 at CIME exit)? Beam port Schematic diagram of the Cryotrap principle SRF Ithaca, July 15th 20/17