【作者】 宫辉； 邵贝贝；

【Author】 Hui Gong;Beibei Shao;Dept.of Engineering Physics, Tsinghua University;Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education;

【机构】 清华大学工程物理系； 清华大学粒子技术与辐射成像教育部重点实验室；

【摘要】 大型加速器及反应堆周边的辐射场存在辐射强度变化范围大的特点。对这种辐射场进行辐射监测时,所用的辐射监测系统不仅应具有宽动态范围,而且要能够在强辐射场下长期稳定工作。针对这种需求,本文描述了一种由大动态范围微弱电流测量电路、微弱电流传输电缆以及电离室等构成的辐射监测系统的设计。通过使用长距离的微弱电流传输电缆,可使微弱电流测量电路远离强辐射区域,从而避免电子学系统因长时间辐照而失效。更多还原

【Abstract】 To monitor the radiation level around the large accelerator and nuclear reactor, the radiation monitoring system must have large dynamic range and can work reliably under the intense radiation field. According to the requirement, a large dynamic range radiation monitoring system is designed, which mainly consists of an ionization chamber, an ultra low current transmission cable and an ultra low current measurement circuit. With the cable, the ultra low current measurement circuit can be installed far from the intense radiation field to avoid the radiation damage due to long-term radiation exposure.更多还原