新型定时系统设计  

Design of a novel timing system

作　　者：刘鸣[1,2] 殷重先[1] 赵黎颖[1] 刘德康[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《核技术》2010年第6期425-428,共4页Nuclear Techniques

摘　　要：大型加速器系统中,事件定时系统广播确定性数据,即事件发生器(EVG)传递定时信号给事件接收器(EVR)。如EVR能彼此通讯,定时和实时数据传输两个功能就集成在一个系统中。新型定时系统是一种实时同步数据总线,可实现上述功能。本文描述了新型定时系统的系统结构、硬件设计和规格,包括定时脉冲的精度、定时脉冲相对于高频时钟的时间晃动及实时数据的传输速率进行了说明。另外,系统还特别考虑了拓扑结构的冗余性和对光纤长度的补偿。新型定时系统的硬件初步设计和实验室测试已完成。In a large scale accelerator facility, the event timing system is a sophisticated deterministic data broadcasting system, in which signal generator broadcasts timing messages to signal receivers. If the signal receivers can communicate with each other, the timing function and real-time data transfer function can be satisfied in one unified system. Based on this idea, a novel timing system was developed at SSRF to realize the function mentioned above. In this paper, we describe the system structure, hardware design and its specifications, including timing trigger accuracy, timing trigger jitter relative to RF signal and data transfer rate. The system design further attaches special importance to redundant topology structure and fiber length compensation. The system＇s preliminary hardware design and laboratory test have been completed.

关 键 词：定时系统 实时数据传输 时间晃动 

分 类 号：TL503.6[核科学技术—核技术及应用]