【摘要】 合肥先进光源（Hefei Advanced Light Facility,HALF）是基于衍射极限储存环的第四代同步辐射光源。定时系统采用事件定时技术方案，主要向HALF装置的注入器、储存环和光束线等提供触发信号，协调注入和束流测量工作，实现对储存环任意束团的填充。装置中设备的触发信号抖动要求小于30 ps，同时要降低由光纤长度变化引起的信号漂移。针对以上设计要求，基于芬兰Micro-Research Finland Oy(MRF)公司的MTCA.4总线硬件完成了定时系统的设计，并在此基础上完成了软件控制程序的开发以及原型系统的性能测试。测试结果表明，触发信号的抖动小于24 ps，经延迟补偿后的信号漂移控制在3 ps左右，达到了HALF定时系统的设计要求。更多还原

【Abstract】 [Background] Hefei Advanced Light Facility(HALF) is a fourth-generation synchrotron radiation light source based on diffraction-limited storage ring. The timing system provides trigger signals for the HALF injector,storage ring and beamline, coordinates injection and beam measurement, and achieves filling of the storage ring bucket with any designated bunch pattern. [Purpose] This study aims to design a timing system for HALF to reduce the trigger signal jitter of the HALF device to less than 30 ps, and stabilize the signal drift caused by the optical fiber length change. [Methods] Based on the MTCA.4 event-driven products from Micro-Research Finland Oy(MRF), the event timing technology scheme was adopted to implement the timing system. Appropriate system frequencies for electron gun, microwave system and storage ring were selected to achieve different modes of storage ring bucket filling scheme. The timing system software was developed under Experimental Physics and Industrial Control System(EPICS) to coordinate with the control system of HALF, including an EPICS driver, database records, and operation interfaces. Delay compensation was applied to signal drift caused by the variation of optical fiber length. Finally, a prototype of the timing system was developed for performance tests. [Results & Conclusions] The results show that the jitter of the trigger signal is less than 24 ps, and the signal drift is controlled at about 3 ps after delay compensation, both meet the design requirements of HALF timing system.更多还原