Grupo de Física Nuclear Experimental IEMIEM CSIC ISOL MAGISOL Meeting January 2009Mª José Gª Borge SPIRAL 2 Outline: GANIL SPIRAL SPIRAL2 DESIR Collaboration Experiments at DESIR Highlights Planning

Grupo de Física Nuclear Experimental IEMIEM CSIC GANIL / SPIRAL 2 LINAG (high intensity d and stable beams) Production building Existing GANIL facility LIRAT 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 + ?? CIME SISSI LISE

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge 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 (30-60 keV) beams for decay spectroscopy laser spectroscopy ion and atom trap experiments Spokes-person: Bertram Blank GANIL liaison: Jean-Charles Thomas

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge 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 + high resolution mass separator + laser ionization source (element selection during ionization)

Grupo de Física Nuclear Experimental IEMIEM CSIC Mª José Gª Borge The DESIR Facility The DESIR instalation: RFQ + HRS in the production building building close to GANIL/SPIRAL and SPIRAL2 Facilities Radioactive beams from GANIL, SPIRAL2 and S3 MAGISOL Meeting January 2009

Grupo de Física Nuclear Experimental IEMIEM CSIC 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 an electrostatic quadrupole deceleration field (to reduce losses at the injection) Results so far: * Prototype tested at high-current separator SIDONIE (Orsay)  a 1.1  A beam has been trapped (O. Gianfrancesco et al., Proc. EMIS2007)

Grupo de Física Nuclear Experimental IEMIEM CSIC 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 To be incorporated in production building High transmission Compact (12m x 8m) Match beam emittance from RFQ cooler M/  M = 20000

Grupo de Física Nuclear Experimental IEMIEM CSIC DESIR PRODUCTION BUILDING LINAG EXISTING EXPERIMENTAL AREAS CIME EXISTING ACCELARATORS CSS2 CSS1 S3 Schematic SPIRAL 2 LAYOUT Recent idea from 2007: send S3 radio-isotopes (re-ionized from gas cell) to DESIR set-ups for mass, radii, moments, decay studies ….

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge The DESIR experimental set-ups BESTIOL LUMIERE MOT LPCTrap

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge LUMIERE Light Utilization for Measurements and Ionization of Exotic Radioactive Elements Nuclear properties deduced from observation of magnetic and electrostatic hyperfine structure in optical spectra. Techniques: Collinear Laser Spectroscopy β -NMR (Nuclear magnetic Resonances) Key-Experiments: -  Extending charge radii, moments and spins of nuclei around 78 Ni and 132 Sn (neutron-rich isotopes in the fission peaks)  Charge radius changes in exotic Rb(N>90), Sr (N>100) and Yb (N>177)  Hyperfine structure and charge radii of Trans-actinides  Ground state spin of N = 49 and N = 51 isotones with even Z ( β -NMR )  Charge radius of 100 Sn (S3)

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge BESTIOL ( Beta dEcay at the Spiral2 IsOL Facility) Beta-decay studies can be done with very low yield. Half-life determination. First glance into the structure of the nucleus. High production allows full spectroscopy  degree of overlap between proton and neutron states in parent and daughter nucleus. Far from stability beta-delayed particle decay open. Highlights:  Super-allowed  -decays and the standard model of electro-weak interaction  Stellar nucleosynthesis at A  80 ; 80 Zr  New Magic numbers  Shape coexistence, deformation and Gamow-Teller distribution  Transition from order to chaos

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge General Purpose Set up DSSD-detectors for  p Array of Clover detectors ToF for neutron spectroscopy. Need of fast tape station Physics: Transition from order to chaos in neutron deficient nuclei Search for new candidates to  -2p emission New magic numbers: Characterization of 40 Mg, 54 Ca. Nuclei with large N/Z ratios need to be produced : 110 Zr 70 Odd-even stagering in the S 2n of nuclei near 132 Sn

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge Double Penning –Trap assisted spectroscopy: Super-allowed  -decays  Present knowledge of fundamental interactions summarized in standard model. Tested by high precision measurement (10 -4 ) of super-allowed Fermi decays: Q,T,BR Ft = ft(1+  ’ R )(1+  NS -  c ) = K/M F 2 G’ 2 V Study of N = Z odd-odd nuclei 82 Nb, 86 Tc, 90 Rh, 94 Ag and 98 In MLL-Trap built in Munich will serve to purified the beam - Fast separation -Sufficiently high resolving power (M/  M = 10 5 ) -high capacity (up to 10 6 ions) -high transmission ( > 30 %)

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge Total Absortion Spectroscopy after the MLL-Trap With very purified beams one can do Total absortion spectroscopy to obtain the B GT - distribution Surrey-Valencia 12 BaF 2 TAS

Grupo de Física Nuclear Experimental IEMIEM CSIC MAGISOL Meeting January 2009 Mª José Gª Borge Beta-delayed neutron Set up

Grupo de Física Nuclear Experimental IEMIEM CSIC MLL trap system:LMU München860 kEuros  -charged particle setup:France, ANR VS 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

Grupo de Física Nuclear Experimental IEMIEM CSIC DESIR: Financial situation Main parts:estimated costs fund available RFQ and HRS « building »: most likely 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€ -

Grupo de Física Nuclear Experimental IEMIEM CSIC GANIL/SPIRAL 1 today DESIR Facility low energy RIB DESIR Facility low energy RIB RIB production building RIB production building LINAC S3 NFS SRI Recent modifications: High-intensity stable beam ion source (A/q=3) included in the baseline project RIB laser source included in the baseline project RFQ+HRS also for post-accelerated beams Only one production cave in the production building SRI hall not included in the Phase 1 Recent modifications: High-intensity stable beam ion source (A/q=3) included in the baseline project RIB laser source included in the baseline project RFQ+HRS also for post-accelerated beams Only one production cave in the production building SRI hall not included in the Phase 1 RFQ+HRS

Grupo de Física Nuclear Experimental IEMIEM CSIC Schedule of SPIRAL 2 Decision on the construction of DESIR (dead-line) Decision on the construction of DESIR (dead-line)