基于FELIX的微结构气体探测器读出电子学系统设计

Research on FELIX-based Readout Electronics System for Micro-pattern Gas Detector

微结构气体探测器因其精度高、面积大等优点,在粒子物理实验中得到了非常广泛的应用.微结构气体探测器的未来应用将面临ASIC种类多、通道数多、数据量大等问题,给读出电子学系统的设计带来了很大的挑战,已成为微结构气体探测器进一步发展应用的瓶颈.FELIX系统具有数据带宽大、通道数多等特点,可很好解决这一问题.基于FELIX的电子学系统由完成探测器信号数字化的前端电子学模块、完成数据汇总的GBT模块、完成数据读出的FELIX系统、完成数据处理的数据处理终端组成,可完成10240路半数字通道读出或4096路模拟通道读出.该系统与Micromegas探测器一起实现宇宙线径迹探测,验证了该系统的通用性和兼容性,为微结构气体探测器的应用需求提供了一个通用的解决方案.

Micro-pattern gas detectors(MPGDs)have been applied in many fields.With.the rapid development of MPGDs,readout electronics system has been a bottleneck to the further application of MPGDs.This paper presents a FELIX-based scalable readout electronics system facing the problem.It consists of pre amplifier modules,a FELIX.which acts as a data router between front-end electronics and DAQ system,2 GBT(gigabit transceiver)modules based on FPGA which acts as a bridge between chip carri-er and FELIX,and chip carriers whose main function is detector signal conditioning and digitization.The prototype system has 10240 electronic channels applying semi digital ASIC MICROROC and 4096 electronic channels applying analogue ASIC AGET.Results of joint tests with Micromegas indicate the system works well with different kinds of chip carriers.The design offers a flexible readout solution for different applica-tion scenarios of MPGDs.