为了补偿由于各种因素引起的微波相位漂移 ,BEPCⅡ直线加速器需要建立微波相位反馈控制系统 .能量最大法将用来确定每台功率源的最佳相位 .沿直线加速器速调管长廊铺设相位稳定同轴线提供相位参考 .现在已经完成了关键部件 ,如PAD单元、IA单元的开发 .搭建了相控最小系统对系统进行了验证 . In order to compensate for the microwave phase shift caused by various factors, the BEPC linear accelerator needs to establish a microwave phase feedback control system. The energy maximum method will be used to determine the optimal phase of each power source. The coaxial line provides the phase reference and has now completed the development of key components such as the PAD unit, IA unit, and a phased-in minimum system has been built to validate the system.