Simulation and design of a fast neutron radiography detector based on MCP

被引：6

作者：

Ma, Z. -W. ^{[1
]}

Li, W. -M. ^{[1
]}

Ran, J. -L. ^{[2
]}

Huang, Z. -W. ^{[1
]}

Zhang, S. -J. ^{[1
]}

Li, K. -J. ^{[1
]}

Yao, Z. -E. ^{[1
,3
]}

机构：

[1] Lanzhou Univ, Sch Nucl Sci & Technol, Tianshui South Rd 222, Lanzhou 730000, Gansu, Peoples R China

[2] Chinese Acad Sci, Inst Modern Phys, Nanchang Rd 509, Lanzhou 730000, Gansu, Peoples R China

[3] Lanzhou Univ, Minist Educ, Engn Res Ctr Neutron Applicat, Tianshui South Rd 222, Lanzhou 730000, Gansu, Peoples R China

来源：

JOURNAL OF INSTRUMENTATION | 2018年 / 13卷

基金：

中国国家自然科学基金;

关键词：

Detector modelling and simulations I (interaction of radiation with matte; interaction of photons with matter; interaction of hadrons with matter etc); Neutron detectors (cold; thermal; fast neutrons); Neutron radiography; MICROCHANNEL PLATE DETECTORS; 2-PHASE FLOW; FUEL; EFFICIENCY; RESOLUTION; TRANSPORT; PART; LINE;

D O I：

10.1088/1748-0221/13/05/P05034

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A fast neutron detector, consisting of a high-density polyethylene sheet, a micro-channel plate, a phosphor screen, a reflection mirror and a CCD camera, is proposed for fast neutron radiography purpose. To optimize the design of the detector, a series of simulations are performed by using Geant4 code. Simulation results indicate that the maximum conversion efficiency of the high-density polyethylene is about 0.38% when its thickness is 2 mm. To ensure the spatial resolution of the detector, the distance between high-density polyethylene and micro-channel plate should be as small as possible. The gap between MCP and PS is selected as 2 mm with a bias voltage of -4 kV to balance the luminescence efficiency and the spatial resolution of the PS. With the optimized structure, the detection efficiency of the detector is calculated to be 0.14% and the spatial resolution is possibly better than 500 mu m.

引用

页数：13

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