摘要
为确定裂变电离室探测器及其前置放大器的最优设计参数,对裂变电离探测器及其前放电路的设计原理进行了研究。结合中子源和反应堆中子场实验,给出了裂变电离室探测器极间距的估算公式以及填充气体成分和压力的确定原则,同时发现灵敏区长度、总面积、涂铀层厚度及系统信噪比是影响脉冲模式灵敏度的关键参数。本文还讨论了保证电荷灵敏放大器变换增益稳定输出的方法,提供了前置放大器电荷灵敏放大器变换增益和RC常数计算公式,并总结了验证探测器输出电荷量和确定前放电路主要参数的方法。本工作为裂变电离室及其前放电路的开发提供了设计原理依据,可为后续设备试验及设计优化提供参考。
This paper studies the design principles of the fission chamber detector and the preamplifier(PA)circuit in order to determine their optimal design parameters.The formula for estimating the spacing between two electrodes and determining principle of filling gas composition and pressure are given with considering the practical neutron source and reactor test,meanwhile,it is found that the length of sensitivity,total area,uranium layer thickness and system signal noise ratio are the critical parameters to the system pulse mode sensitivity.The method to obtain a stable conversion gain for the PA charge sensitive amplifier are discussed,the computing formula of conversion gain and RC constant are provided,and also the method to verify the charge output of the detector and the determination of the parameters of the preamplifier circuit are summarized by this paper.This work provides the design principle basis for developing the fission chamber detector and PA circuit,and can be as the reference for further equipment test and design optimization.
作者
高兴兵
孙光智
张宓
王益元
刘文臻
曾乐
肖伟
翟春荣
石先武
GAO Xing-bing;SUN Guang-zhi;ZHANG Mi;WANG Yi-yuan;LIU Wen-zhen;ZENG Le;XIAO Wei;ZHAI Chun-rong;SHI Xian-wu(State Nuclear Power Automation System Engineering Company,Shanghai 200240,China;Wuhan Secondary Institute of Ships,Wuhan 430205,China;Nuclear and Radiation Safety Center,Ministry of Ecology and Environment of the People’s Republic of China,Beijng 100082,China)
出处
《核电子学与探测技术》
CAS
北大核心
2022年第3期444-448,共5页
Nuclear Electronics & Detection Technology
基金
国家科技重大专项(2019ZX06002012)资助。
