The beam energy feedback system for Beijing electron positron collider II linac

• DOI: 10.1063/1.4979070
• Publication Date: 2017-03-28T12:33:56Z
• Authors: S. Wang; M. Iqbal; Y. Chi; R. Liu; X. Huang
• Keywords: 03 medical and health sciences; 0302 clinical medicine

A beam-energy feedback system has been developed for the injection linac to meet beam quality needed Beijing electron positron collider II storage ring. This paper describes implementation and commissioning of this in detail. The consists an energy measurement unit, application software, actuator unit. non-intersecting monitor was allow real-time online adjustment. adjustment is achieved by adjusting output microwave phase RF power source station. control mechanism also modified, a new method taking return difference shifter into account used improve system’s performance. achieves design aim can adjust center with rate 2 Hz. With system, stability better; fluctuation range reduced from 20 mA/min 10 mA/min, while maintained within ±0.1%.