CSR外靶径迹探测器的前端电子学升级

Upgrade of Front-End Electronics for CSR External Target Track Detector

多丝漂移室(MWDC)用于兰州重离子加速器−冷却存储环上外靶实验终端的径迹测量,其前端电子学中放大芯片采用SFE16芯片,目前前端电子学单板通道数较少,且慢控配置模块老旧,无法兼容新设备,配置效率较低。该文对前端板(FEE)进行升级,单板实现32通道;并设计一种基于现场可编程门阵列(FPGA)的配置板,通过上位机USB接口实现对多块SFE16芯片的快速高效配置。电子学测试实验结果表明,升级后的前端电子学在增加通道数的基础上保证了原有性能,并实现单次对248片SFE16芯片的配置,使用简单,配置效率高,实用性好。

The multi wire drift chamber(MWDC)is used for track measurement of the external target experimental terminal at heavy ion research facility in Lanzhou-Cooler storage ring.The amplification chip in the front-end electronics(FEE)adopts SFE16 chip.At present,the number of single board channels in the front-end electronics is few;In addition,the slow control configuration module is obsolete and cannot be compatible with new devices,resulting in low configuration efficiency.Therefore,the FEE is upgraded in this paper,and the single board realizes 32 channels;and a configuration board based on field programmable gate array(FPGA)is designed to realize fast and efficient configuration of multiple SFE16 chips through USB interface of host computer.The electronics test results show that the upgraded FEE guarantees the original performance on the basis of increasing the number of channels,and realizes the configuration of 248 SFE16 chips at a time.It is simple to use,efficient to configure,and practical.