| 镀膜型nMCP探测效率和位置分辨优化的蒙特卡罗模拟研究 |
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| 引用本文： | 张连军,周健荣,杨建清,谭金昊,宋玉收,孙志嘉. 镀膜型nMCP探测效率和位置分辨优化的蒙特卡罗模拟研究[J]. 原子核物理评论, 2021, 38(2): 190-195. DOI: 10.11804/NuclPhysRev.38.2020058 |
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| 作者姓名： | 张连军 周健荣 杨建清 谭金昊 宋玉收 孙志嘉 |
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| 作者单位： | 1.哈尔滨工程大学，哈尔滨 150000 |
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| 基金项目： | 国家重点研发计划项目(2017YFA0403702)；国家自然科学基金资助项目(U1832119, 11775243)；中央高校基本科研业务费(3072020CFQ1501, 3072020CFQ1502)；中国科学院青年创新促进会 |
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| 摘 要： | 中子敏感微通道板(Neutron sensitive microchannel plate,nMCP)因其具有高探测效率和位置分辨,配合先进的读出电子学可作为能量分辨中子成像探测器的优先选择.相比于基体掺杂型的nMCP,基于原子层沉积技术(Atomic Layer Deposition,ALD)的nMCP具有原材料消耗...
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| 关 键 词： | 中国散裂中子源 nMCP 探测效率 位置分辨 优化计算 |
| 收稿时间： | 2020-08-22 |
Monte Carlo Simulation Study on Optimization of Detection Efficiency and Spatial Resolution of Coated nMCP |
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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 |
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| Authors: | Lianjun ZHANG Jianrong ZHOU Jianqing YANG Jinhao TAN Yushou SONG Zhijia SUN |
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| Affiliation: | 1.Harbin Engineering University, Harbin 150000, China2.Spallation Neutron Source Science Center, Dongguan 523803, Guangdong, China3.State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China4.Xi’an Research Institute of Hi-Tech, Xi’an 710025, China |
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| 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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