基于球谱仪的中子剂量率仪设计

研制了一套基于球谱仪的中子剂量率仪。采用单个慢化球及位置灵敏计数器的探测结构,通过单次测量即可计算出中子剂量等信息。在基于电荷分配法的读出电路中,通过对电荷灵敏放大器及滤波成型电路的参数进行优化,使探测器系统的平均位置分辨达到6 mm。利用硬件寻峰等数字信号处理技术,使数据获取系统的最高计数率达到200 k·s-1,满足剂量率仪实时性的要求。...

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Bibliographic Details
Published in核技术 Vol. 38; no. 1; pp. 50 - 54
Main Author 陈炼 梁福田 王宝琛 金革
Format Journal Article
LanguageChinese
Published 核探测与核电子学国家重点实验室中国科学技术大学 合肥230026 2015
Subjects
中子剂量率仪
位置灵敏计数器
数字脉冲处理
电荷分配法
中子剂量率仪
数字脉冲处理
Digital pulse processing
Position-sensitive counter
Charge division
位置灵敏计数器
电荷分配法
Neutron dosimeter
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ISSN0253-3219
DOI10.11889/j.0253-3219.2015.hjs.38.010402

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Summary:研制了一套基于球谱仪的中子剂量率仪。采用单个慢化球及位置灵敏计数器的探测结构,通过单次测量即可计算出中子剂量等信息。在基于电荷分配法的读出电路中,通过对电荷灵敏放大器及滤波成型电路的参数进行优化,使探测器系统的平均位置分辨达到6 mm。利用硬件寻峰等数字信号处理技术,使数据获取系统的最高计数率达到200 k·s-1,满足剂量率仪实时性的要求。
Bibliography:Neutron dosimeter, Position-sensitive counter, Charge division, Digital pulse processing
CHEN Lian LIANG Futian WANG Baochen JIN Ge （State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China）
31-1342/TL
Background： In neutron radiation protection applications, the spectrometric neutron dosimeter has almost isotropic response and can cover the energy from thermal to GeV neutrons, and the radiation filed information such as neutron spectrum and neutron dose can be calculated more accurately. Purpose： A spectrometric neutron dosimeter which has high precision and high counting rate is developed. Methods： By optimizing the parameters of the readout circuit, the position resolution of the detector system is improved and the geometric division of the spherical moderate is more accurate. Using digital pulse processing technology, the dead-time of the system is reduced. Results： The position resolution of the neutron dosimeter has good linearity, and t
ISSN:0253-3219
DOI:10.11889/j.0253-3219.2015.hjs.38.010402