1. The DESIR facility at SPIRAL2  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 Désintégration, Excitation et Stockage d’Ions Radioactifs Decay, excitation and storage of radioactive ions

2. * MLL trap system (LMU Munich) *  -charged particle set-up (Bordeaux, GANIL, Strasbourg, Orsay, Madrid) * Collinear laser set-up (Manchester, Leuven, Birmingham, Orsay)  talk P. Campbell, Thursday, 17.00u *  -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) The DESIR experimental set-ups (present status)  All these collaborations are obviously open to other interested users!

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

4. 6 He + production at SPIRAL LIRAT low energy beam line cooling in H 2 gas / bunching trapping/measuring candidate:(pure GT transition) deduce  angular correlation from measurement of  -recoil (recoil with very low energies < 1 keV) LPC Paul trap @ LIRAT Production and preparation of 6 He for weak-interaction studies Oscar Naviliat-Cuncic et al., LPC Caen

5. SPIRAL 2 LAYOUT LINAG (high intensity d and stable beams) Production building For RIB Existing GANIL facility LIRAT +LIRAT2 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 + ??

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

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 Goals: * high-voltage (20 kV), high frequency (20 MHz) linear radio-frequency quadrupole trap for strong confinement of  A 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  A beam has been trapped (O. Gianfrancesco et al., Proc. EMIS2007) See talk F. Duval, LPC, Tuesday in ‘selected contributions’

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

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

11. 1+ beam DESIR x Paul trap Off-line Ion sources D. Lunney, CSNSM Collinear Laser Line MOT  -NMR ~ 1500 m 2 neutrons general purpose spectroscopy trap

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. MLL trap system:LMU München860 kEuros  -charged particle setup:France, ANR VS3 2006240 kEuros Collinear laser spectroscopy: Manchester300 kEuros Orsay200 kEuros Leuven150 kEuros  -NMR setup:Leuven100 kEuros Spectroscopy setup:Madrid200 kEuros MOT trap:KVI Groningen500 kEuros TAS setup:Valencia180 kEuros Neutron detection (multiplicity, TETRA setup): Dubna200 kEuros Neutron detection (energy): (LPC Caen and others) 400 kEuros Equipment to come to DESIR

14. The DESIR facility in FP7 preparatory phase Study of exotic nuclei at ISOL energies using decay, excitation and storage of nuclei 1 st year2 nd year T1T2T3T4T1T2T3T4 DESIR Collaboration Committee meetings DESIR Collaboration meeting Tests of the MLL trap Design of the DESIR beam lines Design of the HRS Memorandum of understanding 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. 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€ Deliverables: Reports on - MLL trap test - beam line design - HRS design MoU signed

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 set up 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 !