The DESIR facility at SPIRAL2 Désintégration, Excitation et Stockage d’Ions Radioactifs Result of the SPIRAL2 workshop held at GANIL on July 2005: « Physics with low energy beams at SPIRAL2 » http://spiral2ws.ganil.fr/2005/lowenergy/program/presentations/ Working groups: - Beam handling and beam preparation - Laser spectroscopy - Decay spectroscopy An opened collaboration to promote ISOL beams at SPIRAL2 : B. Blank, M.J.G. Borge, P. Cambell, F. Herfurth, F. Leblanc, M. Lewitowicz, D. Lunney, O. Naviliat-Cuncic, G. Neyens, J.C. Thomas and …

DESIR Physics program Call for LoI : May 2006 Laser spectroscopy: collinear laser spectroscopy and b-NMR  moments, spins, radii, etc… Fundamental interactions:  CVC, CKM matrix: 0+ → 0+ transitions  exotic interactions like scalar or tensor currents  electric dipole moments to test CP and T violation with e.g. Ra Decay spectroscopy:  p-p correlation, astrophysics, cluster emission, GT strength  exotic shapes, halo nuclei, etc... Solide state physics and other « applications » Call for LoI : May 2006

“Physics with low energy beams at SPIRAL2” Conclusions of the SPIRAL2 Workshop (July 2005) : M. Lewitowitcz “Physics with low energy beams at SPIRAL2” Technical requirements A new experimental area of about 1500m2 A High Resolution mass Separator (HRS) with a resolution of M/M>5000 Proposed separation scheme: Low Resolution mass separator → RFQ cooler → HRS Availability from day 1 Neutron-rich and neutron-deficient beams More than one production target – ion source station (flexibility) Fast change of the mass setting 5. Extension of the current LIRAT beam line

SPIRAL 2 LAYOUT GANIL facility LIRAT LINAG Production building DESIR

Production building Exp. Hall HRS Ident. CIME n+ Deuteron 1+ LIRAT beam Ident. HRS Exp. Hall Production building Deuteron CIME

Underground

Spectroscopy of trapped beams Fundamental Interactions Ground-floor Laser Spectroscopy Spectroscopy of trapped beams Decay studies Other purposes Cooling/Bunching Fundamental Interactions

Synergies with FAIR/NuSTAR and LPC expertise Beam preparation: cooler, traps, trap-assisted spectroscopy (MATS) Laser setups (LASPEC) Neutron detection (NCAP) New types of charged-particle and gamma detectors (e.g. LaBr3) Low-energy beam diagnostics

Towards DESIR DESIR project presented to the IN2P3 SC : 07/06 DESIR LoI presented to the SP2 SAC : autumn 2006 Proposals for experiments: spring 2007 DESIR building design study: B.Blank, CENBG DESIR HRS+cooler: D. Lunney, CSNSM Laser ionization source: F. Le Blanc, IPN Orsay-ALTO DESIR identification station: J.-C. Angelique, LPC (??) Test bunch for diagnostic tools at LIRAT ? Decay spectroscopy station: VS3 project (ANR 2006)

Possible extension of LIRAT Multi-beam facility (physics program  2011) Tests and development for SPIRAL2 & DESIR LIRAT today Spec. b LPC Trap R&D SPIRAL2 1+ n+

VS3 A Versatile and Standalone Spectroscopy Setup Funding demand: ANR 2006 – 543 k€ RIB facilities: ALTO, LIRAT, DESIR, (ILL, ISOLDE ?) Physics motivation Nuclear structure of neutron-rich nuclei by means of b and e- spectroscopy : 82-86Ge at ALTO (year 2) Correlation studies : nucleon-nucleon interaction and cluster structures from multiparticle emission processes (b-xp, b-xa) : b-2p decay of 31Ar at LIRAT (year 4) Test bench for low energy (radioactive) beam diagnostics

Stable & radioactive beam diagnostic system VS3 Faraday Cup SiXY Collimators Profiler Segmented b detector D. Verney, IPNO 8p Si Cube, VME acquisition Low Energy Beam B. Blank, CENBG Profiler Stable & radioactive beam diagnostic system J.-C. Thomas, G. Frémont, GANIL N. Orr, J.-C. Angélique, L.A. Achouri, G. Iltis, J.-M. Gautier, LPC G. Simpson, LPSC Ph. Dessagne, IReS Fast (>5 m/s) tape transport system

Man power & funding request Contribution du LPC scientifique : 3 personnes à 20 % pendant 18 mois technique : 2 personnes à 30 % pendant 24 et 36 mois Budget :

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