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DESIR Progress Report DESIR hall details defined for civil construction:

DESIR Progress Report DESIR hall details defined for civil construction: - compressed air, liquid nitrogen, cooling water, etc detailed layout of RFQ-HRS room in production building first transmission tests of RFQ RF system successful tested detailed optical study of HRS

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DESIR Progress Report DESIR hall details defined for civil construction:

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  1. DESIR Progress Report • DESIR hall details defined for civil construction: • - compressed air, liquid nitrogen, cooling water, etc • detailed layout of RFQ-HRS room in production building • first transmission tests of RFQ • RF system successful tested • detailed optical study of HRS • S3 – DESIR beam line is established • work on safety at DESIR started • DESIR web pages online (www.cenbg.in2p3.fr/desir) EURORIB meeting, 10 June 2008

  2. S3 SPIRAL2 layout N F S S R I Accelerator Level 0 15 m DESIR Level -1 Spiral and GANIL Production building

  3. Production building F. Varenne

  4. S3 Connections to DESIR Level 0 15 m DESIR Level -1 Spiral and GANIL

  5. 8m Legend: Electronics Quadrupole Sextupole Multipole Dipole 12m RFQ and HRS cave HRS RFQ storage and maintenance

  6. Length = 70 cm Radius = 3mm The High Intensity RFQ Cooler SHIRaC

  7. Test bench at LPC-Caen (Oct 07/ Jan 08) • Current tests are done with ionization source • Imax ~ 50 nA

  8. Simulation First Part: • Code developments including RF fields, microscopic approach for cooling, space charge • Input beam : 133Cs+ beam • Emittance : 75π.mm.mrad • Energy : 20keV • Intensity : 1µA • Cooling distance at 0.05mbar ~ 400mm • Output emittance < 1π.mm.mrad • Injection efficiency ~ 25 % • Acceptance ~ 35 π.mm.mrad Second Part: • Two cooling sections with different r0-radius • 5 mm and 3 mm + 4mm junction • Same RF on the two sections • Better injection efficiency (~ 100%) • Acceptance ~ 75 π.mm.mrad • Same cooling effect • Same emittance • Better overall efficiency

  9. DN160 Flange Electrodes Ø7 Insulator 2 SHV Micrometric screw 2µm RF breakdown (Jan 08/Mar 08) • 2 electrodes face to face • RF amplitude • Helium pressure • Gap • Roughness Working pressure • No RF breakdown : • For Etching polishing under 3600Vpp and 15Pa • For Ra 1.6 under 3400Vpp and 12.5Pa

  10. Beam transmission (Jun 08) • Cooler in RF-only : 10 % for 23Na+ and 133Cs+ • Transmission vs RF voltage for 133Cs+ :

  11. SHIRaC Modification (Sep 08) • Additional pump • Low pressure at injection and extraction electrodes • Gaz injection • Emittance measurement  more details on the poster of F. Duval

  12. DESIR HRS 3 x’s, 3 y’s, 3 ’s, 3 ’s, 1 mass, 1 energy 3 p mm mrad, 50 keV Mass resolution: M/DM = 20000

  13. COSY INFINITY: X and Y projections 3 p mm mrad, 50 keV R = 22091

  14. DESIR HRS: Simulations First and fifth order mass separation for 1/20000 mass difference Initial and final beam envelops

  15. DESIR HRS: misalignments tests  more details on the poster of T. Kurtukian Nieto 0.2 mm shift of multipole: significant loss in mass resolution

  16. General purpose LN2 Control room Gas & waste storage IS TAS off-line source 1 Collinear Laser spectroscopy b-NMR off-line source 2 Penning trap + Decay setup MLL trap Double MOT RFQ bun- cher Paul trap DAQ room General purpose Neutron ditch Electronics Desk Access Laser room (mezzanine) DESIR layout 17/04/08 Identification station with tape Beam from S3 LUMIERE Level 0 BESTIOL Level -1 Beam from Production building Kitchen (on top of CR) Level -1 Crane access to basement Meeting room (on top of DAQ) 5 m Beam from SPIRAL1

  17. Supply Assembly Room 3 Gray Room 2 Electri- city Stor- age 1 Stor- age 2 Gray Room 1 Assembly Room 1 Assembly Room 2 free free free Work- shop Control Racks Inter- faces HV supplies Crane access to basement 5 m Neutron ditch DESIR Level -1 Limits DESIR hall

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