冷却储存环外靶γ球子触发系统设计  

Design and implemention of sub-trigger system for CSR external target γ detection

作　　者：宋海声[1] 苏凤娇 李先勤 张奇[3] 陈勇[3] 闫铎[2] 杨海波[2] 孔洁[2] 苏弘[2] SONG Haisheng;SU Fengjiao;LI Xianqin;ZHANG Qi;CHEN Yong;YAN Duo;YANG Haibo;KONG Jie;SU Hong(Northwest Normal University,Lanzhou 730070,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]西北师范大学,兰州730070 [2]中国科学院近代物理研究所,兰州730000 [3]哈尔滨工业大学,哈尔滨150001

出　　处：《核技术》2020年第3期25-31,共7页Nuclear Techniques

基　　金：国家自然科学基金(No.11664036、No.11605265);兰州区域中心(No.2020g101)资助~~

摘　　要：介绍了兰州重离子加速器冷却储存环(Heavy Ion Research Facility at Lanzhou-Cooling Storage Ring,HIRFL-CSR)外靶实验子触发判选系统的设计,该系统可实现对外靶实验中γ球探测器输出信号的筛选从而保证后续的物理分析可以高效进行。系统基于Flash型现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)研制,主要是对光口模块和以太网模块进行设计,分别用来实现与总触发判选系统的通信和与上位机的信号传输。目前已完成实验室电子学测试,测试结果能够满足当前子触发系统满足外靶实验需求。[Background] The gamma detection array is an important device in the heavy ion research facility at Lanzhou-cooling storage ring(HIRFL-CSR). In order to eliminate invalid information such as background noise in the experiment, to ensure that subsequent physical analysis can be performed efficiently, a sub-trigger selection system needs to be designed for CSR external target γ detection array. [Purpose] This study aims to design aforementioned sub-trigger system for selectable interesting signal in the events recorded by the gamma detector.[Methods] Based on flash-based field programmable gate array(FPGA), this sub-trigger system mainly consisted of the optical fiber interface and the Ethernet interface. The former was used for signal transmission with global trigger and system, and the latter was used to communicate with host computer. Experimental tests were carried out to evaluate the performance of the sub-trigger system. [Results & Conclusions] The test results show that this subtrigger system is suitable for external target experiment.

关 键 词：外靶实验 子触发判选系统 Flash型FPGA 光纤接口 以太网 性能测试 

分 类 号：TL8[核科学技术—核技术及应用]