,Preliminary design of a femtosecond timing system for large accelerator facilities

• 作 者: Ming Liu Xiao-Lei Dai Chong-Xian Yin Bin-Qing Zhao
• 机 构: Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China“,”University
• 出 处: 核技术（英文版）
• 发表日期: 2018年3期
• 关键词: Timing system Large accelerator facilities Synchronization in femtoseconds

Large accelerator facilities require clocks and triggers with high accuracy to synchronize equipment and devices. A new femtosecond timing system was designed to meet the demands of new facilities. In this system, the radio-frequency signal is modulated in a continuous-wave laser carrier with frequency stabilization,and timing events are distributed in the same fiber.The phase drift is detected precisely, based on the principle of the Michelson inter-ferometer.The phase drift is compensated with coarse and fine correctors afterward. We aim to realize the stable transmission of the RF signal and timing events for a long distance and duration, with the phase drift and addi-tive jitter in femtoseconds.After the extension,the system will become a complete solution for the clock-and-trigger distribution of synchrotron radiation facilities,free-electron lasers, and other accelerators. The physics design, simu-lation analysis,and preliminary results are included in the paper.