作者：刘聪, 刘显坤, 郑洲, 兰晓华, 薛志彦
作者单位：中国工程物理研究院核物理与化学研究所, 四川 绵阳 621900
关键词：PDHID;冷中子源;气相色谱;氢;可调压进样装置
摘要：
针对氦中痕量氢难以分析的问题,应用高灵敏度的脉冲放电氦离子化检测器(PDHID),结合可调压进样装置,对冷中子源氦制冷系统中的氢杂质进行分析,结果精密度高,相对标准偏差RSD1%,总测量不确定度3%,测定氢的检出限达10L/m3,比TCD检测器的检出限低4个量级.
Application of PDHID detector on hydrogen impurity analysis in helium refrigeration system of cold neutron source
LIU Cong, LIU Xiankun, ZHENG Zhou, LAN Xiaohua, XUE Zhiyan
Institute of Nuclear Physics and Chemistry, China Academy of Engineering and Physics, Mianyang 621900, China
Abstract: High-sensitivity pulsed discharge helium ionization detector(PDHID) together with pressure regulated sample injection device is applied to analyse the hydrogen impurity in helium refrigeration system of cold neutron source, and the difficulty on trace hydrogen analysis in helium is successfully solved. The results show high precision that the relatively standard deviation namely RSD is less than 1%, general measurement uncertainty is less than 3%, and the lowest detection limit of hydrogen measurement is less than 10 μL/m3, which is four orders lower than TCD detector.
Keywords: PDHID;cold neutron source;gas chromatography;hydrogen;pressure regulated sample injection device house of quality
2015, 41(3): 34-36,41 收稿日期: 2014-7-8;收到修改稿日期: 2014-9-11
基金项目:
作者简介: 刘聪(1988-),男,四川遂宁市人,实习研究员,主要从事冷中子源及中子导管技术研究工作.
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