以2.856GHz频率上相位控制达到±2°为目标,阐述北京正负电子对撞机重大改造工程注入器相控系统设计思路,提出相应的系统实现结构.在分析相控过程的基础上,分解系统指标,把它作为相控系统详细设计和关键部件测试的依据.最后,针对相位测量这一关键问题,给出了具体的实现方法.

RF phasing system of BEPCⅡ Injector is required to reach the precision of ±2° at the frequency of 2.856GHz. Based on the analysis of elements that affect RF phase for accelerating particles, a general design for this system is presented in this paper, which gives the system structures and its control strategy, reduces the system requirement of ±2° into the feasible parameters of key instruments, and explains even its RF phase measurement. Considering the characteristics of electromagnetic environment of BEPCⅡ injector, as many as possible optic devices and digital measurement technique are introduced to improve the EMC performance of the system.