The DESIR Facility: physics and technical solutions

1. The DESIR Facility: physics and technical solutions • Physics at DESIR • RFQ cooler SHIRaC • HRS • transfert beam lines • DESIR building • safety • finances J.C. Thomas, GANIL 19-20 July 2010

2. DESIR at SPIRAL2 RFQ & HRS

3. The DESIR Physics Case

4. The BESTIOL facility (BEta decay STudies at the SPIRAL2 IsOL facility) • Decay studies with halo nuclei • Clustering studies in light nuclei • Super-allowed b decays and the standard model of electro-weak interaction • Cases of astrophysical interest • New magic numbers • Transition from Order to Chaos • Shape coexistence, deformation and Gamow-Teller distribution • High-spin isomers • Test of isospin symmetry combined with charge exchange reactions • Beta-delayed charged-particle emission: e.g. proton-proton correlation

5. LaBr3(Ce) HPGe (NE111A) LaBr3(Ce) Beta-decay studies Charged-particle detection: neutron detection: Total absorption spectrometer Fast timing steup beam

6. } for ground and isomeric states LUMIERE: Laser Utilisation for Measurement and Ionization of Exotic Radioactive Elements • Collinear Laser spectroscopy: • - spins • - magnetic moments • - quadrupole moments • - change of charge radii • N=50, N=64, N=82, etc. • b-NMR spectroscopy: • - nuclear gyromagnetic factor • - quadrupole moment • monopole migration of proton and neutron single particle levels around 78Ni • persistance of N=50 shell gap around 78Ni • persistance of N=82 shell gap beyond 132Sn • Microwave double resonance in a Paul trap: • - hyperfine anomaly and higher order momenta • (octupole and hexadecapole deformation) • Eu, Cs, Au, Rn, Fr, Ra, Am ….

7. LUMIERE: Laser spectroscopy at DESIR G. Neyens, P. Campbell, F. Le Blanc et al.

8. Possible layout of LUMIERE  a normal-vacuum line with 2 (or 3) end stations for optical detection, polarized beam experiments, …  a UHV beam with differential pumping for CRIS b-g asymmetry set-up b-NMR set-up CRIS beam line Multi-purpose station (e.g. photon-ion coincidence detection) Polarization axis Polarization axis Polarization axis BUNCHED and COOLED beams from off-line ion source S2 or S3 beams based on collinear laser beam line at TRIUMF C.D.P. Levy et al. / Nuclear Physics A 746 (2004) 206c–209c

9. DESIRtrap: Trapping experiments at DESIR • Mass measurements • Trap-assisted decay sepctroscopy • In-trap decay spectroscopy • Parity non-conservation measurements • Angular correlation measurements and standard model of • electro-weak interaction

10. Mass measurements with the MLL trap • Progress in: • temperature stabilization • pressure stabilization • 4-way bender for injection line to use different sources • multi-reflection TOF spectrometer for beam purification MLL trap at Garching Multi-reflection TOF spectrometer (U. Giessen) 4-way bender

11. beta telescope PM plastic scintillator DSSSD beam monitor mCP 6He+ 10cm mCP recoil ion detector Exotic interactions with the LPCTRAP • b-n angular correlation cooling in H2 gas / bunching trapping/measuring O. Naviliat-Cuncic, E. Liénard et al., LPC Caen

12. Technical development for the DESIR facility

13. RFQ cooler SHIRaC SPIRAL2 High-intensity Radioactive beam Cooler Purpose: cool high-intensity radioactive beams to low phase space  2 p mm mrad Solution: strong fields, high frequency Simulated with microscopic approach  Requirements: 700 mm long R0=5 mm 10 MHz RF 10 kVptp

14. RFQ cooler SHIRaC: High voltage RF develoments 2 loops • 500 W amplifier • Resonant circuit with • inductive coupling • (no ferrite cores) • HV Tunable capacitor for • broadband use F. Duval, G. Ban, R. Boussaid et al., LPC Caen

15. RFQ cooler SHIRaC: SHIRaC2 at LPC From Drawings to reality… • Completed in April 2010 • Test with high intensity beams in 2010 • Adaptation to Nuclear environment • Interfacing with HRS

16. DESIR High Resolution Separator HRS: “U180” B. Blank, T. Kurtukian Nieto, F. Delalee, L. Serani, CENBG Form: QQSQDMDQSQQ • Purpose: • purification of radioactive beams • aim: resolution 20000 • transmission: ~ 100%

17. Dm = = 31.5 cm/% R ~ 31000 HRS: COSY INFINITY simulations 3 π mm.mrad T. Kurtukian Nieto

18. Pumping unit Slits Diagonistics DESIR HRS Layout

19. SPIRAL2 identification station DESIR HRS and beam lines to DESIR and CIME DESIR CIME

20. DESIR HRS parts multipole Quad-quad and quad-hexapole quadrupole triplet quad-quad quad-hex CIME CIME

21. HRS calendar: • global optical design finished • mechanical design and integration done • magnetical design of dipole on the way • detailed drawings of all elements for end 2010 • ordering of dipoles in 2011 • manufacturing of other elements at CENBG • installation at CENBG during 2013 • transfer to GANIL 2014

22. DESIR beam transport lines D. Lunney, CSNSM F. Delalee, CENBG -> following a design proposed by D. Lunney -> 6 m long sections, 2 doublets of quadrupoles

23. DESIR beam transport lines F. Varenne, GANIL -> following a design proposed by F. Varenne -> 7 m long sections, 2 triplets of quadrupoles

24. DESIR building

25. DESIR in numbers • collaboration: about 100 scientists on LOI and TDR • collaboration committee: 10 – 12 scientists and engineers • design: 2008 - 2010 • construction begin: hopefully in 2012 • commissioning: 2014 • budget: • base line project: 10-12 M€ • experiments: 5-6 M€

27. DESIR beam transport sections DESIR SPIRAL1 S3 SPIRAL2 Design proposed by F. Varenne Design proposed by D. Lunney Beam lines to DESIR • mecanical design will be performed most likely at IPN Orsay in 2010/11

28. Optical and magnetical design of HRS • (Close to) final design of the HRS • which includes: • mecanical contraints • radioprotection considerations • optical needs Resolution M/DM ≈ 30000 Beam envelope in X: Beam envelope in Y: