基于APV25芯片的GEM探测器读出电子学系统的测试与改进  

Test and Improvement of Readout System Based on APV25 Chip for GEM Detector

作　　者：胡守扬[1] 蹇司玉 周静[1] 单超[1] 李兴隆[1] 李霞[1] 周意[2] 李笑梅[1] 

机构地区：[1]中国原子能科学研究院核数据重点实验室,北京102413 [2]中国科学技术大学核探测与核电子学国家重点实验室,安徽合肥230026

出　　处：《原子能科学技术》2014年第6期1143-1146,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11175262);核探测与核电子学国家重点实验室开放课题基金资助项目;973计划资助项目(2013CB837800);中国科学院先导专项江门中微子实验和中国原子能科学研究院院长基金联合资助项目

摘　　要：气体电子倍增器(GEM)是目前最具发展前景的位置灵敏气体探测器。其新一代读出电子学系统包括APV25前端卡、多用途数字转换器(MPD)、VME控制器及基于Linux的采集软件DAQ。本工作完成了读出系统的调试,获得了系统在40MHz和20MHz工作频率下的理想数据。在长时间测试中,系统运行稳定。通过对软件配置的优化和对硬件的改进,降低了噪声水平,提高了信噪比。Gas electron multiplier （GEM ） is the most promising position sensitive gas detector .The new generation of readout electronics system includes APV 25 front-end card ,multi-purpose digitizer （MPD ） , VME controller and Linux-based acquisition software DAQ . The construction and preliminary test of this readout system were finished ,and the ideal data with the system working frequency of 40 M Hz and 20 M Hz were obtained .The long time running test shows that the system has a very good time-stable ability .Through optimizing the software configuration and improving hardware quality ,the noise level was reduced ,and the signal noise ratio was improved .

关 键 词：GEM 探测器 APV25前端卡 多用途数字转换器 工作频率 

分 类 号：O572.21[理学—粒子物理与原子核物理]