基于丝壁电离室的数字化氚在线测量系统的研制  

Development of an On- Line Tritium Monitoring System of Digitization Based on Wire- Wall Ionization Chamber

作　　者：孟丹[1] 陈志林[1] 常瑞敏[1] 穆龙[1] 吴冠银[1] 刘秀华[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2014年第7期893-896,共4页Nuclear Electronics & Detection Technology

基　　金：国家磁约束核聚变能研究专项(2011GB111005)

摘　　要：涉氚场所中的氚浓度在线测量是保障工作安全顺利进行的有力条件。针对涉氚场所中氚主要以氚气形式存在的特点,设计并研制了一套数字化氚在线测量系统。该系统采用补正极原理设计了丝壁电离室,消除了氚在进入电离室前产生的电离离子对测量结果的影响;开发了数字化信号处理系统,可自控获取、处理及显示过程中的氚浓度。系统在氚靶生产过程中得以应用,结果表明,丝壁的设计使得电离室室壁氚吸附产生的记忆效应减小到1%以内,系统中的氚浓度能够在线实时准确测量、显示,能很好地满足涉氚场所氚在线测量的要求。On-line tritium monitor is one of the key points for a successful operation of involving tritium places.According to the form of tritium gas,an on-line tritium monitoring system of digitization was devel-oped.The wire-wall ionization chamber was designed based on the compensation anode principle,which elimi-nated the influence of ionization ion for measurement results before the tritium entering the ionization chamber. At the same time,the digital signal processing system was developed,which can access,process and display triti-um concentration automatically.It was checked out in the tritium target preparation progress.The results indi-cate that the memory effect of the wall of the ionization chamber is reduced to less than 1%,the concentration of tritium in the system can be on-line real-time measurement.This monitor system can meet the need of on-line tritium monitor in involving tritium places.

关 键 词：氚气 丝壁电离室 氚测量 

分 类 号：TL811[核科学技术—核技术及应用]