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The DESIR facility at SPIRAL2

The DESIR facility at SPIRAL2. D ésintégration, E xcitation et S tockage d’ I ons R adioactifs Decay, excitation and storage of radioactive ions. collaboration initiated during the first SPIRAL2 workshop, July 2005 to use SPIRAL2 and SPIRAL low energy (<60 keV) beams for

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The DESIR facility at SPIRAL2

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  1. The DESIR facility at SPIRAL2 Désintégration, Excitation et Stockage d’Ions Radioactifs Decay, excitation and storage of radioactive ions • collaboration initiated during the first SPIRAL2 workshop, July 2005 • to use SPIRAL2 and SPIRAL low energy (<60 keV) beams for decay spectroscopy laser spectroscopy ion and atom trap experiments • Spokes-person: Bertram Blank • GANIL liaison: Jean-Charles Thomas Gerda Neyens, SAC SPIRAL2, 26 november 2007

  2. The DESIR experimental set-ups (present status) • * MLL trap system (LMU Munich) • * b-charged particle set-up (Bordeaux, GANIL, Strasbourg, Orsay, Madrid) • * Collinear laser set-up (Manchester, Leuven, Birmingham, Orsay) •  talk P. Campbell, Thursday, 17.00u • * b-NMR set-up (Leuven) • * MOT trap (KVI Groningen, LPC Caen) • * TAS set-up (Valencia) • * TETRA neutron set-up (Dubna)  talk Y. Penionzhkevich Thursday 17.00u • * Neutron energy set-up (LPC Caen) • * LPC-trap (LPC Caen)  All these collaborations are obviously open to other interested users!

  3. GANIL Today Existing GANIL facility LIRAT Low energy beams from SPIRAL EXPERIMENTAL AREAS GANIIL cyclotrons CIME (SPIRAL cyclotron) Ligne d'IonsRAdioactifs àTrès basse énergie....

  4. candidate: (pure GT transition) LPC Paul trap @ LIRAT Production and preparation of 6He for weak-interaction studies deduce bn angular correlation from measurement of b-recoil (recoil with very low energies < 1 keV) 6He+ production at SPIRAL cooling in H2 gas / bunching trapping/measuring LIRAT low energy beam line Oscar Naviliat-Cuncic et al., LPC Caen

  5. SPIRAL 2 LAYOUT Existing GANIL facility LIRAT +LIRAT2 Production building For RIB DESIR Low energy beams from SPIRAL and SPIRAL2 (and S3 ?) S3 High-intensity stable beams on thin target + in-flight high-resolution separator + gas cell for stopping + ?? LINAG (high intensity d and stable beams)

  6. Schematic SPIRAL 2 LAYOUT EXISTING EXPERIMENTAL AREAS EXISTING ACCELARATORS CSS1 CSS2 CIME PRODUCTION BUILDING LINAG Recent idea: send S3 radio-isotopes (re-ionized from gas cell) to DESIR set-ups for mass, radii, moments, decay studies …. DESIR S3

  7. Beam requirements for ISOL-type experiments:  high degree of purity needed for exotic beams ! = good mass selectivity and element selectivity. Suggested solutions for SPIRAL2 produced beams: + RFQ high-efficiency cooler/buncher for efficient reduction of beam emittance (G. Ban, LPC, DESIR session and F. Duval, LPC, Tuesday 17.00u) + high resolution mass separator (T.Kurtukian-Nieto, CENBG, DESIR session Tuesday 9.00u) + laser ionization source (element selection during ionization) (A. Olivier, IPNO and N. Lesecne, GANIL, Thursday 17.00u)

  8. SHIRaC = SPIRAL2 High Intensity Radiofrequency Cooler Prototype RFQ linear Paul trap, set up initially at CSNSM Orsay Now transferred to LPC Caen for further development See talk F. Duval, LPC, Tuesday in ‘selected contributions’ Goals: * high-voltage (20 kV), high frequency (20 MHz) linear radio-frequency quadrupole trap for strong confinement of mA beams. (gain factor 100 in confinement compared to present devices) * incorporate two sections with different radius (to reduce losses at the injection) Results so far: * Prototype partially tested at high-current separator SIDONIE (Orsay) a 1.1 mA beam has been trapped (O. Gianfrancesco et al., Proc. EMIS2007)

  9. High Resolusion Mass Separator See talk T.Kurtukian-Nieto, CENBG, DESIR session Tuesday 9.00u • symmetric design, inspired by the CARIBU HRS at Argonne National Laboratory: with two magnetic dipoles D combined as QQHQD M DQHQQ six quadrupoles Q two sextupoles H one multipole M  To minimize aberrations, provide large mass dispersion Suggested layout Beam profile in x-direction Status: in design phase Integrated in production building

  10. Linac beam Production building RFQ cooler IBE 1+ DESIR 1+ Ion source 1 User request: By-pass RFQ/HRS Ion source 2 CIME n+ IBE n+ HRS Booster F. Varenne, GANIL

  11. 1+ beam DESIR ~ 1500 m2 b-NMR general purpose spectroscopy Paul trap Collinear Laser Line MOT trap neutrons x Off-line Ion sources D. Lunney, CSNSM

  12. DESIR: Financial situation • Main parts: estimated costs fund available • RFQ and HRS « building »: included in SPIRAL2 project • DESIR building: 6000 k€ 2000 k€ (CPER) • RFQ: 320 k€ 320 k€ (CPER) • HRS: 500 k€ - • beam lines: 3600 k€ - • off-line source 60 k€ -

  13. Equipment to come to DESIR MLL trap system: LMU München 860 kEuros b-charged particle setup: France, ANR VS3 2006 240 kEuros Collinear laser spectroscopy: Manchester 300 kEuros Orsay 200 kEuros Leuven 150 kEuros b-NMR setup: Leuven 100 kEuros Spectroscopy setup: Madrid 200 kEuros MOT trap: KVI Groningen 500 kEuros TAS setup: Valencia 180 kEuros Neutron detection (multiplicity, TETRA setup): Dubna 200 kEuros Neutron detection (energy): (LPC Caen and others) 400 kEuros

  14. The DESIR facilityin FP7 preparatory phase Study of exotic nuclei at ISOL energies using decay, excitation and storage of nuclei Task : organise meetings of the DESIR Coordination Committee, prepare the proposal for the DESIR facility, study the high-resolution separator and the beam lines of DESIR contribute to the development of the trapping system of DESIR. Deliverables: Reports on - MLL trap test - beam line design - HRS design MoU signed Requested Budget manpower: 142k€ (Beneficiary CNRS, KVI) 2 post-docs for beam line and HRS material: 16k€ (Beneficiary: GANIL, CNRS) travel funding for collaboration meetings ~ 40k€

  15. DESIR Meeting Conv. : B. Blank(Atelier Alcandre, Congress Center) Tuesday 9.00-11.00 Welcome – B. Blank (CENBG) The DESIR building - J.C Thomas (GANIL) DESIR RFQ cooler SHIRAC – G. Ban / F. Duval (LPC) DESIR high-resolution separator – T. Kurtukian – Nieto (CENBG) Setups forseen for DESIR – B. Blank (CENBG) Financial aspects – B. Blank (CENBG) MLL trap at DESIR – P. Thirolf (LMU Muenchen) The LIRAT2 project – J.C Thomas (GANIL) Laser spectroscopy setup for LIRAT2 / DESIR – G. Neyens (K.U Leuven) Laser resonant ionisation to purify radioactive beams – K. Flanagan (CERN) Organisation of the DESIR collaboration – B. Blank (CENBG) DESIR Proposal – B. Blank (CENBG) DESIR web page – B. Blank (CENBG) EVERYBODY WELCOME !

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