用于γ辐射场测量的差分电离室的设计

摘要

The design of a type of high pressured differential ionization chamber used fory radiated field is presented. Using dual -chamber, single signal output and appending lead shield,-γ radiated signal emitted from a given direction in intense γ radiated field is measured by differential technology. According to Monte - Carlo simulation and experimental test, the detector with a layer of Sn has a good energy response. Additionally, the design of a weak signal amplifier circuit matching for the chamber is introduced.%设计了一种用于测量γ辐射场的高气压差分电离室.采用双电离室、单输出的探头结构和添加铅屏蔽体相结合的方法,实现了强γ辐射场中特定方位γ辐射信号的差分测量技术.通过蒙特卡罗模拟和试验测试,在探头外包裹锡带的探测器获得了较好的能量响应线性.同时,还介绍了与差分电离室相配套的弱信号放大电路的设计.