| 基于气体电子倍增器原理的高能X射线工业CT气体探测器 |
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| 引用本文： | 周日峰,陈伟民,段晓礁.基于气体电子倍增器原理的高能X射线工业CT气体探测器[J].原子能科学技术,2011,45(6):741-745. |
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| 作者姓名： | 周日峰 陈伟民 段晓礁 |
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| 作者单位： | 重庆大学 ;光电技术及系统教育部重点实验室ICT研究中心，重庆400044 |
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| 基金项目： | 重庆市科技攻关项目资助 |
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| 摘 要： | 分析了高能X射线工业CT所常用的闪烁探测器的优缺点，及传统气体电离室探测器存在的不足。为克服这些缺点和不足，从X光子与物质相互作用理论出发，结合高能工业CT的结构特点，探讨了高能窄X射线束入射到薄金属片中X光子和光电子的输运过程，提出了以高密度的金属片作为X光子辐射转换体，以气体电子倍增器作为光电子倍增放大的新型高能工业CT探测器方案。并利用基于Linux平台的EGSnrc程序进行了Monte-Carlo仿真。从原理上说明了这种气体倍增探测器相对于传统气体电离室探测器，既有较高的探测效率，其体积也大为减小，替代高能工业CT传统的闪烁体探测器在理论上是可行的。
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| 关 键 词： | 高能X射线工业CT 气体电子倍增器 闪烁体探测器 |
Gas Detector of High Energy X-ray Industrial CT Based on Gas Electron Multiplier |
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| ZHOU Ri-feng,CHEN Wei-min,DUAN Xiao-jiao.Gas Detector of High Energy X-ray Industrial CT Based on Gas Electron Multiplier[J].Atomic Energy Science and Technology,2011,45(6):741-745. |
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| Authors: | ZHOU Ri-feng CHEN Wei-min DUAN Xiao-jiao |
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| Affiliation: | ICT Research Center, Key Lab for Opto electronic Technology & Systems of Ministry of Education, Chongqing University, Chongqing 400044, China |
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| Abstract: | This paper analyzes the characteristics of the scintillator detectors which have been widely used in high energy X-ray industrial computed tomography(ICT) currently,and shows the shortcomings of traditional gas detectors.To solve these problems,a new gas detector which makes use of metal slab as X-ray convertor and the gas electron multiplier as electron amplifier was investigated based on the profound analysis of the theory about the mutual action between radiation and substance.In the end,the EGSnrc Monte... |
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| Keywords: | high energy X-ray ICT gas electron multiplier scintillator detector |
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