BEPCⅡ磁铁电源控制系统(英文)

BEPCⅡ Magnet Power Supply Control System

BEPCⅡ约有460台磁铁电源分布在储存环和输运线上．绝大部分电源要求万分之一的控制精度和稳定度,只有二极磁铁电源要求十万分之五的控制精度和稳定度．所有电源均采用SNS电源控制器PSC/PSI进行控制．在将PSC/PSI用于BEPCⅡ磁铁电源的控制之前,搭建了PSC/PSI控制样机,对电源工程样机进行了开关机、升降电流的控制,并对PSI的DAC/ADC控制精度和稳定度进行测量,结果证明其控制精度和稳定度均满足要求．采用PSC/PSI的优点是控制硬件相同,软件相同,系统集成简单,便于安装．从而缩短控制系统研发周期,节约人力资源．介绍了BEPCⅡ储存环和输运线磁铁电源PSC/PSI控制系统体系结构和功能、电源控制软件的开发以及所取得的阶段性进展．

Two rings will be constructed in the current tunnel to increase the luminosity of BEPC Ⅱ. There will be approximately 460 magnet power supplies in the rings and transport line. Most magnet power supplies require 1×10^-4 control precision and stability. Only the dipole power supply requires 5 × 10^-5 control precision and stability. Using a PSC/PSI for the control of a high precision prototype PS, it has been proven that the PSI can meet the requirement of 5 × 10^-5 precision and stability. For easy integration and maintenance, we decided to use the same hardware and software for the control of all PS in the rings and transport line. So, the control of all power supplies will be based on the PSC/PSI modules and the EPICS toolkits. This paper describes the application of the PSC/PSI for the BEPC Ⅱ power supply control. The status of application software development and power supply control is discussed.