JRA01: ACTAR sk J01-1: Physics constraints and detailed simulations Subtask J01-1-1: Physics constraints Subtask J01-1-1: Simulations sk J01-2: Test modules Subtask J01-2-1: detection/target gas Subtask J01-2-2: Readout chamber Subtask J01-2-3: Magnetic field configuration sk J01-3: Electronics and data acquisition sk J01-4: Particle tracking
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— Large dynamics needed: 0.2-20 MeV— Either magnetic field or ancillary detectors (many)— Energy resolution:
50 keV for Si detectors=>10% at 0.5 MeV, 0.5% at 5 MeV
Position resolution 0.25mm=>2.5% for 1cm, 0.25% for 10cm
—Cubic geometry :Problem with deflection of the beam with BSolid angle reduced by factor 2(4)
—Cylindrical geometry: Problem at small angles (ancillary detectors below 5°)Varying rise times of the pulses
—Preliminary simultations in favor of cylindric geometry with longitudinal electric and magnetic field for reactions related toresonant elastic scattering, inelastic scattering (giant resonances) and transfer reactions.
2 main questions: Cubic or Cylindrical geometry? Magnetic field or not?
Definition of geometry for the next generation active target
Quantities to be measured: curvature radius, collected charge, range, anglesFor 0.5 mm position resolution, E/E=2R/R, expected energy resolution≈100 keV for cm>20°
50cm
Simulations : 78Ni(d,p)79Ni cm=20° Ex=0,1.5,3 MeV
Ex = 0, g.s.Ex = 1.5 MeVEx = 3 MeV
Einc= 8.5 A.MeVD2 at 1atmXreac= 5 cmB=2 T
Hector Alvarez-Pol, Esther Estevez-Aguado, USC
Task J01-2Test modules
Subtask T-J01-2-1: detection/target gasSubtask T-J01-2-2: readout chamberSubtask T-J01-2-3: magnetic field configuration
For subtasks 1 and 2:Three test modules within ACTAR:
Bordeaux TPC (B. Blank et al) using GEMSMAYA (W. Mittig, H. Savajols) and MAYAITO(F. Rejmund, A. Villari), both at GANIL and using wires
Contact established with TACTIC group (York, TRIUMF)
New test module under construction in collaboration with IPN Orsayand LAL for MICROMEGAS
Short title Date due[2] Date RemarkCollaboration meeting to initiate the project. Define in detail the execution plan for the first 18 months. Form working groups focusing on R&D for each task 29/01/09 29/01/09White paper
juin/ 09 nov-09Discussion of the white paper (6-7 June 2005 @ CENBG Bordeaux) 6-7Jun05 6-7June05Preliminary description of detector geometry and juil/ 10 june 06Final description of detector and geometry response Dec.07Detailed work program sep/ 09 Dec.05Installation of test benches Dec.05 sep/ 09Final description for detection/target gas Dec.07Detailed work program sep/ 09 dec.05Description of read-out chamber Dec.07Description of magnetic field options Dec.07Evaluation of existing electronics Dec.05 jan/ 10Establish specification of front end and readout Dec.07Description of tracking procedure Dec.07
LoI presented at the SPIRAL2 SAC Meeting, October 2006« Direct reactions with an active target »Spokerpersons: M.Chartier, D. Cortina, P. Roussel-ChomazSAC recommendations received November 29th
JRA 01 Budget
Remarks-France: all budget for personnel has been given to GANIL which redistributes to Bordeaux and Saclay. One postdoc starts at Bordeaux on December 15th for 9 months. Saclay will have 8 months in 2007.-Spain (USC):one sudent has also started-GB (Liv+Daresbury): a large fraction of budget spent
Remark: ACTAR probably extended until the end of Eurons (instead of end 2007)