Hadron calorimeter (PSD) with new photo-detectors (MPPC) in NA61 experiment at CERN

International Conference on Particle Physics and Astrophysics

物理学;天文学

Golubeva, M.^1 ; Guber, F.^1 ; Ivashkin, A.^1 ; Izvestnyy, A.^1 ; Kurepin, A.^1 ; Morozov, S.^1,2 ; Petukhov, O.^1,2 ; Selyuzhenkov, I.^2,3 ; Svintsov, I.^2 ; Taranenko, A.^2

Institute for Nuclear Research, RAS, prospekt 60-letiya Oktyabrya 7a, Moscow

117312, Russia^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^2

GSI-Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt, Germany^3

关键词: Beam energies;    Dynamic range;    Energy ranges;    Hadron calorimeters;    Measurements of;    Nucleus-nucleus collision;    Plane orientation;    Silicon photo-detector;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012073/pdf
DOI  :  10.1088/1742-6596/798/1/012073

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The Projectile Spectator Detector (PSD) is a segmented hadron calorimeter used in NA61 experiment (CERN) to determine a collision centrality as well as an event plane orientation in nucleus-nucleus collisions. The main goal of the experiment includes studying the onset of de-confinement and searching for the critical point of strongly interacting matter. It is of crucial importance to have a precise characterization of the event class with the PSD for the analysis of event-by-event observables. The PSD has been already used for centrality selection on trigger level in measurements of Be+Be and Ar+Sc reactions at beam energies 13 - 158 AGeV and Pb+Pb reaction at beam energy 30 AGeV. In 2016, the central modules of PSD have been equipped with new Hamamatsu MPPC silicon photo-detectors in order to extend dynamic range for studying Pb+Pb reaction at the full energy range 13 - 158 AGeV. Results of the PSD response on proton and lead beams are presented.