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Volume 38 Issue 2
Jun.  2021
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Lianjun ZHANG, Jianrong ZHOU, Jianqing YANG, Jinhao TAN, Yushou SONG, Zhijia SUN. Monte Carlo Simulation Study on Optimization of Detection Efficiency and Spatial Resolution of Coated nMCP[J]. Nuclear Physics Review, 2021, 38(2): 190-195. DOI: 10.11804/NuclPhysRev.38.2020058
Citation: Lianjun ZHANG, Jianrong ZHOU, Jianqing YANG, Jinhao TAN, Yushou SONG, Zhijia SUN. Monte Carlo Simulation Study on Optimization of Detection Efficiency and Spatial Resolution of Coated nMCP[J]. Nuclear Physics Review, 2021, 38(2): 190-195. DOI: 10.11804/NuclPhysRev.38.2020058
shu

Monte Carlo Simulation Study on Optimization of Detection Efficiency and Spatial Resolution of Coated nMCP

  • 1.

    Harbin Engineering University, Harbin 150000, China

  • 2.

    Spallation Neutron Source Science Center, Dongguan 523803, Guangdong, China

  • 3.

    State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 4.

    Xi’an Research Institute of Hi-Tech, Xi’an 710025, China

Funds: National Key R&D Program of China(2017YFA0403702); National Natural Science Foundation of China(U1832119, 11775243); Fundamental Scientific Research Business Expenses of Central Universities(3072020CFQ1501, 3072020-CFQ1502); Youth Innovation Promotion Association CAS
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    Graphical Abstract
    • Abstract
  • Since neutron sensitive microchannel plates (nMCP) has high detection efficiency and the spatial resolution, combined with advanced readout electronics it can be a better choice for energy-resolved neutron imaging detectors. Compared with the matrix-doped nMCP, the nMCP based on Atomic Layer Deposition(ALD) has the advantages of less neutron sensitive material consumption and high secondary electron emission coefficient on the inner wall of the channel. Firstly, the typical neutron and gamma signal of natGd-doped nMCP were studied experimentally. Geant4 simulation and theoretical calculation were performed to optimize the pore diameter, wall thickness, bias angle and coating thickness of the coated 10B2O3 nMCP. It was shown that the thermal neutron detection efficiency was about 56% and the spatial resolution was about 22 μm when the coating thickness was 1 μm, the pore diameter was 10 μm, the wall thickness was 1 μm and the bias angle was 3°. The results are of great significance to the geometric parameter design of nMCP used as energy-resolved neutron imaging detectors at CSNS.
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    • References (16)
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