PROGRAM
9h-12h30 (Saclay) ; 16:00-20:30pm (RIKEN)
Places: RIKEN: RIBF#306 ; Saclay Orme des Merisiers room 125
Participants:
RIKEN RIBF: Hideaki Otsu (HO), Rui Jiu Chen (RJC), Mizuki Nishimura (MN);
CEA-Saclay IRFU/Service de Physique Nucléaire: Simon Boissinot (SB), Valérie Lapoux (Vlx)
Overview of the beams, reactions, kinematics;
Discussion of the kinematical domain and of the data selection (Vlx)
I. MUST2 calibrations (SB, RJC)
DOCUMENTS:
MUST2 energy calibrations with alpha source overview of strip problems
MUST2 Time calibrations
CsI calibrations for each pad, telescopes 1 to 4, analytical functions of the CsI calibrations
E-DE identifications
Energy resolutions of the DSSD and CsI for each telescope.
II. Reconstruction and data selection
DOCUMENTS:
Analysis of the runs with the 22O beam
Reconstruction on target with PPACs in F8 (SB)
PPAC efficiencies; position resolution on the target
Rotation angle of the target was 45 deg; the uncertainty on this value was checked (projection plots to be discussed).
Definition of the “target selection” corresponding to the reconstruction of the beam trajectories on the frame (with the rotation of 45deg taken into account) and to a cut on the target frame.
Be careful! The selection related to the nature of the beam is done by the PID selection, and then there is the “ target selection” with a cut definition related to the frame which is purely geometrical. This cut is defined once and for the whole data analysis and for all the beams, it has not to be changed for the analysis of the reactions induced by 22O and by the contaminants. This will be the same operation for the runs with the cocktail beam including 24O, the cut will be defined once and not changed afterwards.
Overview of the spectra with the different cuts for the analysis (RJC and SB):
+ PID for the incident beam,
+ Target selection
+ PID in MUST2
+ taking into account the energy losses and straggling in the target of the beam and of the protons.
+ PID in ZDS
Cross-checking (to control the cuts used for PID in MUST2 and in ZDS):
ex 22O PID incident, target selection and proton in MUST2 >>> check corresponding spectra in ZDS
22O PID incident and proton in MUST2 >>>check corresponding spectra in MUST2
Taking into account the same selection of runs, comparison of the spectra obtained by RJC and SB for each telescope of the left block:
Kinematics, excitation energy spectra for Oxygen 22.
NEXT VISIOCONFERENCE:
Kinematics, excitation energy spectra for 21N
(and afterwards for the other beam contaminants, 23F and 20N).
III. Triggers and scalers for normalization purposes
The GMT triggers;
RIDF and MUST2 scalers.
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Kinematics for the main reactions of the Oxygen 22 beam at 262.6 MeV/n induced on the proton target: (p,p’) and knock-out/transfer reactions. |
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Simulations of the (p,p’) reactions of the Oxygen 22 beam at 262.6 MeV/n. |