1. 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 »
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 …

2. 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

3. “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

4. SPIRAL 2 LAYOUT
GANIL facility
LIRAT
LINAG
Production building
DESIR

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

6. Underground

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

8. 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

9. 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)

10. 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+

11. 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

12. 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

14. 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 :

15. Quant est ce qu'on mange ?....