原子能科学技术2018，Vol.52Issue(3)：533-538,6.DOI:10.7538/yzk.2017.youxian.0345
高温气冷堆球流检测系统中CsI(Tl)探测器温度影响研究
Study of Temperature Influence on CsI(Tl) Detector in High Temperature Gas-cooled Reactor Pebble-flow Detection System
摘要
Abstract
In order to ensure the output signal stability of pebble-flow detection system for pebble-bed high temperature gas-cooled reactor (PB-HTGR) during the projection acquisition process,the analysis for dark current stability of detector module is required.In this paper,two sets of CsI(Tl) detector modules were randomly selected and a corresponding controlling and measuring device for temperature and dark current was designed.In addition,the dark current characteristic of the detector module and the controlling requirement were analyzed.Experimental results show that the change of dark current with temperature by each detector unit is approximately exponential.Besides,the dark current fluctuate of the 32nd unit reaches 8 pA when the temperature fluctuate is ±2 ℃ at the room temperature.Therefore,a specialized temperature controlling system for the detection system is to be adopted inevitably.Combining the experimental result with dark current controlling requirement,an optimal temperature controlling range is (18-22) ℃,and the corresponding temperature controlling precision is (±0.92-±0.21) ℃.关键词
高温气冷堆球流检测系统/CsI(Tl)探测器模块/暗电流/温度影响Key words
high temperature gas-cooled reactor pebble-flow detection system/CsI(Tl) detector module/dark current/temperature influence分类
能源科技引用本文复制引用
卢建超,刘锡明,万欣,吴志芳..高温气冷堆球流检测系统中CsI(Tl)探测器温度影响研究[J].原子能科学技术,2018,52(3):533-538,6.基金项目
核能开发科研项目资助(20154602098) （20154602098）
