基于高精度脉冲发生器的定时系统设计  

Design of timing system based on high accurate pulse generator

作　　者：于春蕾 赵欢[1] 胡守明[1] 丁建国[1] YU Chunlei;ZHAO Huan;HU Shouming;DING Jianguo(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800

出　　处：《核技术》2019年第4期7-10,共4页Nuclear Techniques

摘　　要：为满足自由电子激光装置的正常运行需求,需要向加速器设备提供精确的定时触发信号。依据上海软X射线自由电子激光装置(Soft X-ray Free-Electron Laser Facility,SXFEL)的物理需求和系统分配,基于高精度脉冲发生器,结合具有联锁接口的光电转换器,实现了SXFEL定时系统的硬件设计。系统的软件部分使用实验物理与工业控制系统(Experimental Physics and Industrial Control Systems,EPICS)完成基于网络的分布式远程控制。通过在线测试,该系统运行稳定可靠,抖动时间小于150 ps,满足加速器对定时系统的要求。[Background] The Soft X-ray Free-Electron Laser (SXFEL) is the fourth generation light source. The timing system is the key subsystem of the accelerator which can provide accurate timing trigger signal for the devices.[Purpose] This study aims to design a timing system which can totally meet the requirements of SXFEL facility operation.[Methods] According to the physical requirements and system physical equipments allocation of SXFEL, the hardware design of the timing system was based on the high precision pulse generator to realize high precision timing signals. The machine protection system (MPS) interface circuit and photoelectric converter for long distance transmission were developed as well. Experimental Physics and Industrial Control Systems (EPICS) was employed to perform the network-based distributed remote control system.[Results & Conclusions] The system works stably and reliably during the on line operation. The test results show that the jitter time is less than 150 ps, satisfying accelerator's requirements for timing system.

关 键 词：定时 脉冲发生器 实验物理与工业控制系统 光电转换 

分 类 号：TL503.6[核科学技术—核技术及应用]