高计数率气体探测器读出电子学原型机研制

研制一套可用于高计数率气体探测器的读出电子学原型机系统，包括前端板、数据采集板和上位机。前端板采用一款先进的前端读出专用集成电路(ASIC)芯片实现对探测器信号的测量和模数转换；数据采集板利用现场可编程门阵列（FPGA）实现对数据的分析、处理和传输；上位机实现控制指令发送、PC端数据接收及存储等。在22~99 fC的输入范围内，原型机各通道积分非线性均好于024%；联合探测器使用55Fe放射源测试，结果好于相同条件下的商用电子学。可满足20 kHz计数率下GEM TPC探测器的读出需求。

Development of Readout Electronics Prototype for High Count Rate Gas Detector

A readout electronics prototype system that can be used for high count rate gas detector was developed, which includes front end board, data acquisition board and host computer. An advanced front end readout application specific integrated circuit (ASIC) chip was utilized to develop the front end board for realizing the measurement and analog to digital conversion of the detector signal. The field programmable gate array (FPGA) was used on the data acquisition board to realize the analysis, processing and transmission of the data. The host computer performs the sending of control instruction, the data receiving and storage. The prototype was verified through various tests, and it shows that the integral non linearity of all channels is better than 024% in the input range of 22 99 fC. The test results with 55Fe radiation source are better than the results of commercial electronics under the same conditions, and this can meet readout requirements of GEM TPC detector at 20 kHz count rate.