Stabilization of HEPS linac microwave system  

作　　者：Yongyi Peng Nan Gan Xinpeng Ma Cai Meng Jingru Zhang Hao Zeng Jingyi Li 

机构地区：[1]Key Laboratory of Particle Acceleration Physics and Technology,Institute of High Energy Physics,CAS,Beijing,100049,China [2]University of Chinese Academy of Sciences,Bejing,100049,China

出　　处：《Radiation Detection Technology and Methods》2024年第4期1511-1519,共9页辐射探测技术与方法(英文)

基　　金：supported by High Energy Photon Source(HEPS),a major national science and technology infrastructure in China.

摘　　要：Purpose The linac of the High Energy Photon Source has been commissioned.The low-level RF(LLRF)control system for the linac has been developed using MicroTCA.4-based technologies to maintain high stability of beam energy and energy spread.Methods I–Q demodulation and proportional–integral algorithms are used in the LLRF feedback loops.In order to mitigate the effect induced by the variations of the environment of the controller and the temperature of the coolant water,compensations are implemented in the feedback loops.Results The beam energy of the HEPS linac can be stabilized in a level of better than 0.02%with the help of the LLRF system.Conclusion The LLRF system of the HEPS linac has been working stably since March 2023.Multiple effects have been mitigated,yielding better than 0.3°and 0.6%of peak-to-peak stability of the phase and amplitude of the microwave system,respectively.

关 键 词：LINAC LLRF Reference signal Energy stability 

分 类 号：O572[理学—粒子物理与原子核物理]