Performance of the electromagnetic calorimeter module in the NICA-MPD based on Geant4

被引：0
|
作者：
Zhu J. [1 ]
Peng X. [1 ]
Luo S. [1 ]
Xiao W. [1 ]
He L. [1 ]
Liu Y. [1 ]
Luo F. [1 ]
Xiao M. [1 ]
Wang X. [1 ]
机构：
[1] School of Nuclear Science and Technology, University of South China, Hengyang
来源：
He Jishu/Nuclear Techniques | 2023年 / 46卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Coordinate resolution; Energy resolution; Geant4; Time resolution;
D O I：
10.11889/j.0253-3219.2023.hjs.46.120202
中图分类号：
学科分类号：
摘要：
[Background] The barrel-sampled electromagnetic calorimeter (Ecal) is an important part of the MultiPurpose Detector (MPD) in Nuclotron-based Ion Collider fAcility (NICA) that is being built in Russia. It is primarily used to detect energy, time, and position information of electrons and photons in the energy domain from 10 MeV to a few GeV. MPD-Ecal is comprised of 2 400 modules with 16 towers per module. Each tower is made up of alternating layers of 211 scintillator sheets and 210 lead sheets, as well as 16 wave-length shift fibers. [Purpose] This study aims to evaluate the performance, such as energy resolution, time resolution, and coordinate resolution, etc., of the Ecal by simulation. [Methods] The Geant4 software was employed to simulate single-energy electron incident on Ecal to examine the effects of several parameters on the performance of Ecal. Influences of the position of the particle incidence point, the number and thickness of the scintillator and lead layers, the polish of the optical fibre end-face, and the energy and type of incident particles on the energy deposition and resolution, time distribution and time resolution, and coordinate resolution were investigated in details. Finally, the time resolution of a single tower was simulated using the natural cosmic ray package, and the tower's expected time resolution in the cosmic ray test was obtained. [Results] As the electron incidence position moves from the edge to the center of the module, the energy deposition within the scintillator rises from 718 MeV to 758 MeV. With a limited tower length of 415.5 mm, increasing the number of scintillator layers decreases the energy resolution of the module, improves the time resolution of the tower, and worsens the coordinate resolution of the Ecal. Taking into account the performance of the Ecal gauge, the optimal number of scintillator layers in the tower is 211. SiPM detects 42% more photoelectrons at a polish of 0.6 when the fiber end is coated with a reflective material than when it is not. As the polish of the fiber end-face increases, so does the number of photoelectrons detected by the SiPM, and the time resolution of the tower improves. When the fibre end-face polish is 1.0, the time resolution of the tower is less than 103 ps while time resolution of the tower (with 211 layers) in the cosmic ray is 185 ps. [Conclusions] The time and coordinate resolutions of Ecal improve with increasing electron energy under the same circumstances. © 2023 Science Press. All rights reserved.
引用
收藏
相关论文
共 24 条
  • [1] Taranenko A., Status of the mega-science project NICA, Journal of Physics: Conference Series, 1685, 1, (2020)
  • [2] Zinchenko A, Kolesnikov V, Mudrokh A, Et al., Prospects for the study of the strangeness and hypernuclei production at NICA/MPD, Journal of Physics: Conference Series, 1390, 1, (2019)
  • [3] Abgaryan V, Kado R A, Afanasyev S V, Et al., Status and initial physics performance studies of the MPD experiment at NICA, The European Physical Journal A, 58, 7, (2022)
  • [4] Li Y, Han D, Durum A, Et al., A shashlyk electromagnetic calorimeter system for NICA-MPD, Journal of Instrumentation, 15, 11, (2020)
  • [5] Li Y L, Han D, Wang Y, Et al., Beam test results of two shashlyk ECal modules for NICA-MPD, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 958, (2020)
  • [6] Aphecetche L, Awes T C, Banning J, Et al., PHENIX calorimeter[J], Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 499, 2 – 3, pp. 521-536, (2003)
  • [7] Atoian G S, Issakov V V, Karavichev O V, Et al., Development of shashlyk calorimeter for KOPIO[J], Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 531, 3, pp. 467-480, (2004)
  • [8] Dzhelyadin R., The LHCb calorimeter detectors[J], Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 581, 1–2, pp. 384-388, (2007)
  • [9] Karlen D., Near detectors for the T2K experiment[J], Nuclear Physics B - Proceedings Supplements, 159, pp. 91-96, (2006)
  • [10] JINR 2019 MPD NICA technical design report of the Electromagnetic Calorimeter (ECal) rev 3.6
123