Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (4): 040401 doi: 10.13538/j.1001-8042/nst.2013.04.011

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Geant4 simulation of plastic scintillators for a prototype μSR spectrometer

XU Wenzhen1,2  LIU Yanfen1,2  TAN Zongquan1,2  XIAO Ran1,2  KONG Wei1,2  YE Bangjiao1,2,*   

  1. 1State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
    2Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2012-09-18
  • Contact: YE Bangjiao E-mail:bjye@ustc.edu.cn
  • Supported by:

    Supported by National Natural Science Foundation of China (No. 11075154)

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XU Wenzhen, LIU Yanfen, TAN Zongquan, XIAO Ran, KONG Wei, YE Bangjiao. Geant4 simulation of plastic scintillators for a prototype μSR spectrometer.Nuclear Science and Techniques, 2013, 24(4): 040401     doi: 10.13538/j.1001-8042/nst.2013.04.011
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Abstract:

The experimental muon source on China Spallation Neutron Source (CSNS) is expected to be a high intensity (105 μ+/s) surface muon source with a small beam spot of 4-cm diameter. For a practical application of this muon source, we are devoting to develop the first pulsed μSR spectrometer in China. In this paper, the performance of plastic scintillators in the μSR spectrometer is studied by Monte Carlo simulation. The processes such as positron energy deposition, scintillation photons production, light propagation and photon-electron conversion are carefully considered. According to the results, an optimal dimension of the plastic scintillator is proposed using for our future spectrometer, which has a long-strip shape with the dimension variation range of 50–60 mm length, 5–8 mm height, and 10–12 mm width. Finally, we can build a spectrometer with a count rate up to 104e+/s by 100–120 forward and backward segmental detectors in total. The simulation could serve as an important guide for spectrometer construction.

Key words: μSR Spectrometer, Plastic scintillator, Monte Carlo simulation, Scintillation photon transmission