基于 APV25芯片的 GEM 探测器读出电子学系统的测试与改进

摘要

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 .%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40 M Hz和20 M Hz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。