The ALTO facility at IPN

Transcription

1 The ALTO facility at IPN

2 Experimental areas g-spectroscopy Bacchus Split-Pole spectrometer ISOL production cave e LINAC ISOL experimental cave (~100 m 2 ) Radioactive beam lines cluster, molecular & droplets beams Stable beam w/o spectrometer Stable beam with spectrometer

3 MINORCA at ALTO (June 2014 March 2015) Campaign managers: I. Matea and G.Georgiev 12 ORGAM CS HPGe x 0.1% 8 Miniball TC at ~14 cm from target 7.3% 1.33 MeV ancillary detectors: - Orsay plunger (OUPS) - particle detector - DSSD

4 MINORCA physics cases Campaign managers: I. Matea and G.Georgiev

5 Lithium Inverse Cinematics ORsay NEutron source Sample H target 100nA 7 Li MeV γ γ n-induced fission of 238 U n n n n TIPS tagging of 10 7 n/s/cm 2 isomer partners LICORNE Exoticity EXILL SF J. Wilson, M. Lebois et al. Testing ground for NFS@SPIRAL2

6 ν-ball: A hybrid LaBr 3 -Ge array for fast timing spectroscopic studies Construction of a hybrid Ge + LaBr 3 ALTO Goal: to obtain > 10% total gamma photopeak efficiency 24 Clover detectors (Gamma Pool) + 36 LaBr 3 from FATIMA LOI (2015) signed by 43 scientists from 17 different institutions Workshop in Orsay May 2016 (50 participants) Experimental campaign planned for Estimated cost (Transport, mechanics, DAQ) ~140 k

7 ALTO: ISOL installation based on photo-fission: the first of its kind in the world Measured productions yields at the detection point on line with the PARRNe mass separator electrons -> gamma induced fission Production /s/100na measured in june standard ISOLDE target = 14 mm; L = 200 mm ρ = 3.2 g/cm 3 ; T 2100 o C Stable 10 µa electrons 50 MeV fissons/s inside the target Hot plasma/ Surface Ionization/ Laser resonant ionization ion sources green light from French nuclear safety authorities officially granted Spring 2012

8 Present RIB setups and near-future projects Parrne mass separator Identification station TETRA (existing) BEDO (existing) TAS (existing)

9 Progress in the RIB instrumentation (so far) 3 modes, 3 commissioning's, 3 physics results BEDO setup in gamma mode 4 small EXOGAM clovers BEDO setup in neutron mode Dubna neutron detector TETRA BEDO setup fast timing mode LaBr3 IPN, coll. CSNSM, IPHC IPN, coll. JINR (Russia), IPHC IPN, coll. CSNSM, TANDAR (Argentina), INRNE (Bulgaria) PhD: A. Etilé (CSNSM) PRC 91, (2015) PhD: D. Testov (IPN) NIM A815, 96 (2016) M.A.Cardona, D.Hojman, B.Roussière, I.Deloncle et al. to be submitted

10 Present RIB setups and near-future projects Parrne mass 3 projects (partially) financed separator through a «laboratory of excellence» program: LINO POLAREX MLL-trap Identification station TETRA (existing) TAS (existing) MLL Trap (project) Mass measurements POLAREX (project) LTNO ( 3 He/ 4 He) LINO (project) BEDO (existing) Laser-Induced nuclear orientation (µ,q, J p )

11 Beam-time and users ( ) Users ~120 ~ Beam-time 1752 h 3600 h 2712 h 2232 h 3816 h 219 UT 450 UT 339 UT 279 UT 477 UT ALTO - TNA within ENSAR and ENSAR2

12 2015 run 2015 record beam time, limited by the number of operators available High percentage of stable and radioactive nuclear physics experiments Split Pole 2 campaigns RIB 2 campaigns True parallel operation of stable and radioactive beams over several weeks 34 days of RIB in two campaigns

13 The ALTO PAC Richard Casten Chair Yale, USA, Dimiter Balabanski Emmanuel Balanzat Marcella Grasso Stéphane Grévy Adam Maj Paddy Regan Peter Reiter Berta Rubio Jean-Charles Thomas Christina Trautmann Aurora Tumino ELI-NP, Romania CIMAP/GANIL, France IPN Orsay, France Bordeaux-Gradignan, France IFJ PAN Kraków, Poland Univ. Surrey, UK Univ. Koeln, Germany CSIC-Univ. Valencia, Spain GANIL, France GSI, Darmstadt, Germany Kore Univ. Enna & LNS-INFN Catania, Italy Call for proposals once a year

14 Submission procedure form + proposal (3-5 pages) technical details status of previous experiments

15 Referee assignment - the PAC members receive all the proposals. They are strongly encouraged to read all the proposals - one primary + one secondary referee are assigned to each proposal - the primary referee send a pre-report to the chair one week before the PAC meeting

16 ORSAY PAC Evaluation Criteria and PAC Reports A) Proposal analysis TITLE Importance? The main motivation of the proposed. Why in Orsay? The experiment requires.. Beam time for a stable ion beam experiment with some risk of failure is more easily available at Orsay than in other facilities. Need to do in 2016? The work should be performed as soon as possible in view of Need for full beam time? Yes, the beam time estimate seems appropriate to achieve the required statistical accuracy. Feasibility? Yes, but B) Overall opinion The proposal aims at complementing the spectroscopic information. which will allow... The experiment would add valuable information on C) Rating/shifts: A XXX UBT

17 Rating categories A, B, C, D A represents a proposal that is excellent in essentially all respects, proposes important work that is suitable for Orsay, and is feasible, with a well-justified beam time request; B refers to a proposal that is strong in all the above respects, deserves to be done but is ranked slightly lower than those ranked A; C refers to proposals that are lacking in some important aspects and may need further development or improvement (these proposals are either not allocated beam time or are allocated only partial beam time); D refers to proposals that are rated very low and whose beam time requests are rejected. NA means Not Applicable. This typically occurs where no actual beam request is made. In the present Report, it applies to one of the LoI. Note that proposals that contain more than one part may receive different ratings for different parts.

18 Evaluation procedure PAC meeting : Open session oral presentation of the proposals (10') questions (10') - all the PAC members can ask questions Closed session each proposal is discussed as far as it is possible, the discussion aims to find a consensus The final report on each experiment has to be produced by the main referee at the end of the day! The final report of the PAC meeting is produced by the chair within one week and approved by all the PAC members. A very dense work, but remarkably exciting and efficient!

19 March 2015 ORSAY PAC Evaluations

20 ENSAR2 TNA N 7 access program : statistics 2016 (up to now) 2016 Person days 141 Research visits 12 Number of projects 2 Quantity of access offered under the proposal [hours] more projects to be financed by the end of 2016

21 The ALTO facility at IPN