1 / 36

The DESIR facility at SPIRAL2

The DESIR facility at SPIRAL2. SPIRAL2 at GANIL SPIRAL2 Phase 1 and Phase 2 New equipment at SPIRAL2 DESIR facility DESIR physics programme Safety around DESIR. Bertram Blank CEN Bordeaux-Gradignan. CEA Saclay, April 24, 2009. Existing GANIL facility. Phase 2 2013/4. DESIR.

kreginald
Download Presentation

The DESIR facility at SPIRAL2

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. The DESIR facility at SPIRAL2 • SPIRAL2 at GANIL • SPIRAL2 Phase 1 and Phase 2 • New equipment at SPIRAL2 • DESIR facility • DESIR physics programme • Safety around DESIR Bertram Blank CEN Bordeaux-Gradignan CEA Saclay, April 24, 2009

  2. Existing GANIL facility Phase 22013/4 DESIR RIB PRODUCTION S3NFS Accelerator Phase 12012

  3. SPIRAL2 at GANIL

  4. Neutrons for science Atomic & solid state physics Radiobiology & Isotope production Equation of State Role of Isospin Scientific case of SPIRAL2 Heavy and Super Heavy Elements ISOSPIN DEGREES OF FREEDOM IN NUCLEAR FORCES Position of drip-lines N=Z rp-process r-process path Shell structure far from stability Spins&Shapes Spins & Shapes Haloes & Structures in the Continuum www.ganil.fr/research/developments/spiral2/

  5. Gamma Array Particle Array New detectors at SPIRAL2 DESIR S3 NFS AGATA PARIS ACTAR GASPARD FAZIA EXOGAM 2 2006-2007: 19 Letters of Intent, 600 physicists from 34 countries 2008-2009: TDR for big instrumentation at SPIRAL2

  6. DESIR at GANIL GANIL – SPIRAL1 (S1) DESIR Production building SPIRAL2 (S2) S3 Low-energy beams from: S1, S2, S3

  7. S1: Low-energy beams from SPIRAL1 Projectile or target fragmentation at 95 MeV/A main interest: very neutron- and proton-rich light nuclei 1+  n+

  8. Converter n 2H UCx IS n 2H Target IS 2H UCx IS HI Target IS S2: Low-energy beams from SPRIAL2 • Fission, fusion • evaporation, DIC • main interest: • fission products • medium-mass • proton-rich nuclei

  9. S3: Low-energy beams from S3 • Fusion-evaporation • reactions at Coulomb • Barrier, DIC • main interest: • very heavy nuclei • N=Z nuclei • very short-lived • isotopes • refractory elements Gas catcher LISOL G. Savard et al.

  10. RFQ - HRS: Original implementation RFQ-HRS Dm/m = 20000 to DESIR Identification station to CIME

  11. RFQ - HRS: ALPHA version to DESIR Identification station to CIME RFQ-HRS Optical studies for double HRS are under way: aim is m/Dm = 20000 for 2pmm mrad Teresa Kurtukian Nieto, CENBG

  12. High-intensity RFQ Cooler: SHIRAC Length = 70 cm Radius = 3mm Florian Duval, Gilles Ban, Dave Lunney

  13. Longitudinal energy spread Gas : Helium at 10-2 mbar ΔE ≈ 0.18eV (before re-acceleration)

  14. Emittance Without gas : 12 π.mm.mrad Helium at 10-2mbar : 4.75 π.mm.mrad • 4.75 π.mm.mrad @ 3keV → ≈ 1 π.mm.mrad @ 60keV • Still under investigation : • RF heating • Residual gas effect outside the RFQ section • Charge-exchange process

  15. 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 hall Identification station with tape LUMIERE BESTIOL SAS Kitchen + WC (on top of CR) Beam from Level -1 Meeting room (on top of DAQ) Crane access to basement 5 m

  16. Assembly Room 3 Gray Room 2 Electri- city Stor- age 1 Stor- age 2 Gray Room 1 free Assembly Room 1 Assembly Room 2 Control Racks Interfaces HV supplies Crane access to basement 5 m Neutron ditch DESIR hall: level -1 Work shop Radio lab storage Beam from Production building, S3 and SPIRAL1 X Supply Limits of DESIR hall Identification and radioprotection measurements

  17. DESIR work packages • RFQ SHIRAC: Gilles Ban • HRS: Bertram Blank • DESIR building: Franck Delalee • General purpose ion buncher • GPIB + stable ion sources: Pierre Delahaye • Identification station: Philippe Dessagne • Beam transport lines: Francois Le Blanc • Safety and security: Jean-Charles Thomas • Command / Control, diagnostics: Stéphane Grévy

  18. The DESIR Technical Design Report • submitted on December 19, 2008 • presented to SPIRAL2 SAC on January 29, 2009 • strongly supported by SPIRAL2 SAC…. • about 100 pages of technical description of DESIR facility • and its equipment • co-signed by 111 physicists and engineers of 15 countries • contains a general description of buildings and interfaces • description of major installations like traps, spectroscopy • setups etc • report available on DESIR web page (www.cenbg.in2p3.fr/desir)

  19. LUMIERE Laser Utilisation for Measurement and Ionization of Exotic Radioactive Elements F. Le Blanc ,Orsay G. Neyens, Leuven P. Campbell, Manchester • Collinear Laser spectroscopy: • - spins • - magnetic moments • - quadrupole moments • - change of charge radii • b-NMR spectroscopy: • - nuclear gyromagnetic factor • - quadrupole moment • N=50, N=64, N=82, … • Microwave double resonance • in a Paul trap: • - hyperfine anomaly and higher order momenta • (octupole and hexadecapole deformation) • Eu, Cs, Au, Rn, Fr, Ra, Am ….

  20. BESTIOL BEta decay STudies at the SPIRAL2 IsOL facility • Decay studies with halo nuclei • Clustering studies in light nuclei • b-delayed charged-particle emission: e.g. proton-proton correlation • Super-allowed b decays and the standard model of electro-weak interaction • Deformation and Gamow-Teller distribution • 2n correlations, Pn and nuclear structure (r-process) • ... M.J.G. Borge, Madrid b-g setup, B. Blank (Bordeaux) TETRA, Y. Penionzhkevich (Dubna) TAS, J.L. Tain (Valencia)

  21. MLLTRAP • High-accuracy mass measurements • - unitarity of CKM matrix (Vud): 50Mn, 54Co with DM/M~10-10 • - transuranium isotopes (beams from S3): M(Z>102) • In-trap spectroscopy: • - conversion electron and a spectroscopy: shape coexistence • Trap-assisted spectroscopy • - b decay studies of isomerically pure radioactive species P. Thirolf , Munich Set-up being installed at MLL/Garching

  22. KVI atomic trapping facility • New limits on scalar and tensor contributions in the weak interaction • New limits on time-reversal violation in beta decay •  Systematic of atomic parity non-conservation in a long isotopic chain H. Wilschut, Groningen Experimental set-up at KVI

  23. Operation of GANIL/SPIRAL1/SPIRAL2 Standard planning; one production cave DESIR: 29 weeks of RIB/year: 10 weeks of RIB from SPIRAL2, 4 weeks from S3, 15 weeks from SPIRAL1

  24. SAFETY REQUIREMENTS DESIR building + beam lines to DESIR : green zones on and off operation -> controlled accesses -> activity confinement and monitoring (external exposure dose rate + inhalation risks) -> limited impact on the environment -> impact evaluation prior to experiments -> technical solutions to limit the risks

  25. The Dose rate issue (DeD) • working area: DeD < 7.5 µSv/h < 2 mSv/year/worker • temporary working area (< 10 min): DeD < 100 µSv/h • RFQ – HRS: very high activities • RIB from S1: (108 pps 19Ne) -> definitely an issue but: short lifetime and temporary shielding can be mounted (30 cm air + 30 cm concrete) • RIB from S2: can be an issue if long-lived and produced at high yields + contaminants • RIB from S3: I < 106 pps, N~Z nuclei : can be an issue depending on the selectivity, • a emitters

  26. Accidental activity release (inhalation risks) • For any RIB presenting inhalation risks: induced LPCA in Bq/m3 associated with a dose limitation (20 mSv for 2000 h and 1.2 m3/h inhalation) • DESIR safety requirement : released activity < 1 LPCA (at any time -> cooling to be considered) Example of 131I: T1/2 = 8.02 d LPCA = 400 Bq/m3 assuming a 100 % release at room temperature -> Considering a release volume of 10*10*5 m3= 500 m3, A(131I)MAX = 2.E+05 Bq i.e.A(131I)MAX =2.4E+06 pps for 1 day of implantation

  27. 132Sn only In target yield (1014 f/s) 7.7 1011 to 7.9 1011 Beam intensity limitation ~105

  28. Simulation of a laser spectroscopy experiment: 6 runs* 1 day on 132-137Sn, delivered as pure beams

  29. Without isotopic separation: 132Sn case stable

  30. V = 500 m3 No isotopic separation Beam IMAX (pps) for 1 LPCA 132Sn 5.E+04 133Sn 1.E+04 134Sn 1.E+04 135Sn 3.E+03 136Sn 5.E+03 137Sn 1.E+04 Simulation of a laser spectroscopy experiment: 6 runs * 1 day on 132-137Sn, without isotopic separation

  31. Technical solutions • External dose rate exposure: local shielding + DeD monitoring • Activity confinement: vacuum + specific dismounting procedures • Limited impact on the environment: low depression + limited amount of activity < 100 MBq (activity inventory) • “On-line” beam monitoring before the DESIR building: dedicated DeD monitoring station + beam stopper

  32. pepperpots • selectivity (ionization process + mass separation) -> both need to be controlled Beam intensity limitations

  33. Next steps • DESIR safety report (including technical solutions) to be produced by the end of 2009 • Impact evaluation taking into account realistic ionization efficiencies, mass separation resolutions and release fractions -> what are the RIBs of interest?

  34. SPIRAL2 Schedule Phase I Phase II

  35. Next steps...... • RFQ: on-going tests, study of “nuclearisation”, study of final version of RFQ • HRS: detailed optical study of new ALPHA version, detailed mechanical study • beam lines: preliminary design, cost estimate, detailed design study • stable ion sources: definition, purchase • GPIB: study and construction • Identification station: preliminary design, detailed design, construction • DESIR building: like SPIRAL2 Phase 2 construction program…. • decision about construction at latest mid 2010 • Safety schemes • ……

  36. Thanks for your attention

More Related