为了提高对撞亮度,继续保持北京正负电子对撞机(Beijing Electron Positron Collider,BEPC)在世界同类装置中的领先地位,北京正负电子对撞机重大改造工程BEPCⅡ于2001年夏启动,于2009年7月通过国家验收。对BEPCⅡ控制系统进行了重建,该系统采用分布式体系结构,使用系统集成工具EPICS(Experimental Physics and Industrial Control System)进行开发。BEPCⅡ控制系统于2006年11月建成并投入使用,目前系统运行正常,达到了设计指标。本文将介绍新的BEPCⅡ控制系统。
The BEPCⅡ injector linac upgrade goal aims at higher beam energy with smaller beam emittance and energy spread to meet the colliding luminosity upgrade by two orders of magnitude.This paper describes the beam commissioning and operation.The beam energy,energy spread,current,transmission and emittance have met the design goal.The beam orbit and energy instabilities have been studied and a steady beam operation has been realized.