the desir facility at spiral2 collaboration initiated during the first spiral2 workshop, july 2005 ...
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The The DESIRDESIR facility at SPIRAL2 facility at SPIRAL2
collaboration initiated during the first SPIRAL2 workshop, July 2005
to use SPIRAL2 and SPIRAL low energy (<60 keV) beams fordecay 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 RadioactifsDecay, excitation and storage of radioactive ions
* 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 The DESIRDESIR experimental set-ups experimental set-ups(present status)
All these collaborations are obviously open to other interested users!
GANIL TodayGANIL TodayExisting GANIL facility
LIRAT Low energy beams from SPIRAL
EXPERIMENTAL AREAS
CIME (SPIRAL cyclotron)
GANIIL
cyc
lotro
ns
Ligne d'IonsRAdioactifs àTrès basse énergie....
6He+ production at SPIRAL
LIRAT low energy beam line
cooling in H2 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 @ LIRATLPC Paul trap @ LIRATProduction and preparation of Production and preparation of 66He for weak-interaction studiesHe for weak-interaction studies
Oscar Naviliat-Cuncic et al., LPC CaenOscar Naviliat-Cuncic et al., LPC Caen
SPIRAL 2 LAYOUTSPIRAL 2 LAYOUT
LINAG (high intensity d and stable beams)
Production building
For RIB
Existing GANIL facility
LIRAT
+LIRAT2
DESIRLow energy beams fromSPIRAL and SPIRAL2(and S3 ?)
S3High-intensity stable beams on thin target+ in-flight high-resolution separator+ gas cell for stopping+ ??
DESIR PRODUCTION BUILDING
LINAG
EXISTING EXPERIMENTAL AREAS
CIME
EXISTING ACCELARATORS
CSS2
CSS1
S3
Schematic SPIRAL 2 LAYOUTSchematic SPIRAL 2 LAYOUT
Recent idea: send S3 radio-isotopes (re-ionized from gas cell) to DESIR set-ups for mass, radii, moments, decay studies ….
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)
SHIRaC = SHIRaC = SSPIRAL2 PIRAL2 HHigh igh IIntensity ntensity RaRadiofrequency diofrequency CCoolerooler
Prototype RFQ linear Paul trap, set up initially at CSNSM OrsayNow 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’
High Resolusion Mass SeparatorHigh Resolusion Mass Separator
symmetric design, inspired by the CARIBU HRS at Argonne National Laboratory:with two magnetic dipoles D combined as QQHQD M DQHQQ
six quadrupoles Qtwo sextupoles Hone multipole M
To minimize aberrations, provide large mass dispersion
Beam profile in x-direction
Suggested layout
Status: in design phaseIntegrated in production building
See talk T.Kurtukian-Nieto, CENBG, DESIR session Tuesday 9.00u
RFQcooler
DESIR 1+
Booster
IBE 1+
IBE n+
CIME n+
Production buildingProduction buildingLinacLinacbeambeam
Ion source 1
Ion source 2
F. Varenne, GANILF. Varenne, GANIL
HRS
User request:By-pass RFQ/HRS
1+ beam
DESIRDESIR
x
Paul trap
Off-lineIon sources
D. Lunney, CSNSMD. Lunney, CSNSM
CollinearLaserLine
MOT
-NMR
~ 1500 m2
neutrons
generalpurpose
spectroscopy
trap
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€ -
MLL trap system: LMU München 860 kEuros
-charged particle setup: France, ANR VS3 2006 240 kEuros
Collinear laser spectroscopy:Manchester 300 kEurosOrsay 200 kEuros Leuven 150 kEuros
-NMR setup: Leuven 100 kEuros
Spectroscopy setup: Madrid 200 kEuros
MOT trap: KVI Groningen 500 kEuros
TAS setup: Valencia 180 kEuros
Neutron detection (multiplicity, TETRA setup): Dubna 200 kEuros
Neutron detection (energy): (LPC Caen and others) 400 kEuros
Equipment to come to DESIR
The DESIR facilityThe DESIR facility in FP7 preparatory phasein FP7 preparatory phaseStudy of exotic nuclei at ISOL energies using decay, excitation and storage of nuclei
1st year 2nd yearT1 T2 T3 T4 T1 T2 T3 T4
DESIR Collaboration Committee meetingsDESIR Collaboration meetingTests 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 DESIRcontribute to the development of the trapping system of DESIR.
Requested Budgetmanpower: 142k€ (Beneficiary CNRS, KVI) 2 post-docs for beam line and HRSmaterial: 16k€ (Beneficiary: GANIL, CNRS)travel funding for collaboration meetings ~ 40k€
Deliverables:Reports on - MLL trap test- beam line design- HRS designMoU signed
DESIR Meeting Conv. : B. Blank (Atelier Alcandre, Congress Center)
Tuesday 9.00-11.00Welcome – 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 !
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