| 宽量程fA级电离室电流测量 |
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| 引用本文： | 余小平,庹先国,奚大顺,刘明哲,王洪辉.宽量程fA级电离室电流测量[J].核电子学与探测技术,2011,31(10):1181-1185. |
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| 作者姓名： | 余小平 庹先国 奚大顺 刘明哲 王洪辉 |
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| 作者单位： | 1. 成都理工大学信息科学与技术学院,成都,610059
2. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都,610059 |
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| 基金项目： | 国家杰出青年科学基金(41025015); 地质灾害防治与地质环境保护国家重点实验室基金(SKLGP2009Z007、SKLGP2010Z002); 成都市科技攻关计划(10GGYB323GX-023); 四川省科技计划项目(2011SZ0182) |
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| 摘 要： | 针对辐射探测中电流电离室输出电流十分微弱,且电流范围较宽,模拟电路处理困难,难以达到精确测量等问题,设计了可检测nA级到fA级的宽量程电流电离室微弱电流计.提出了以高精度前置放大电路、高分辨率模数转换为基础,从电气隔离、恒温控制、电磁屏蔽等方面,解决模拟处理电路微弱信号易受温度漂移、湿度、电磁干扰影响等问题的方法,从而...
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| 关 键 词： | 电流电离室 微弱信号 恒温屏蔽 宽量程 精确测量 |
Current Measurements of Wide Range fA Level in Ionization Chamber |
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| YU Xiao-Ping,TUO Xian-Guo,XI Da-Shun,LIU Ming-Zhe,WANG Hong-Hui.Current Measurements of Wide Range fA Level in Ionization Chamber[J].Nuclear Electronics & Detection Technology,2011,31(10):1181-1185. |
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| Authors: | YU Xiao-Ping TUO Xian-Guo XI Da-Shun LIU Ming-Zhe WANG Hong-Hui |
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| Affiliation: | YU Xiao-Ping1,TUO Xian-Guo2,XI Da-Shun2,LIU Ming-Zhe2,WANG Hong-Hui2(1.College of Information Science and Technology,Chengdu University of Technology,Chengdu,610059,2.State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection,610059) |
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| Abstract: | In the field of radiation detection,the output current of current ionization chamber is very weak,and the current range is wide.Thus,it is difficult to design such analog circuits and to reach more precise measurements.To achieve this,an ionization chamber faint galvanometer is designed to detection broad range current from nA level to the fA level in the paper.Based on precision preamplifier,high-resolution analog-to-digital conversion,the solution was drawn from electrical isolation,temperature control,el... |
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| Keywords: | Current ionization chamber Weak signal Constant temperature shielding broad measuring range Accurate measurement |
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