Design and optimization of a longitudinal feedback kicker cavity for the HLS-Ⅱ storage ring

查看全文 作　　者：[1,2]徐卫;[2]W.Z.Wu;[1]何多慧;[2]Y.K.Wu 机构地区：[1]National Synchrotron Radiation Laboratory (NSRL),University of Science and Technology of China;[2]Department of Physics,Duke University 出　　处：《Chinese Physics C》索引2013年第37卷第3期,共9页 基　　金：Supported by National Natural Science Foundation of China (10979045, 11175182, 11175180) 摘　　要：In the Hefei Light Source (HLS) storage ring, multibunch operation is used to obtain a high luminosity. Multibunch instabilities can severely limit light source performance with a variety of negative impacts, including beam loss, low injection efficiency, and overall degradation of the beam quality. Instabilities of a multibunch beam can be mitigated using certain techniques including increasing natural damping (operating at a higher energy), lowering the beam current, and increasing Landau damping. However, these methods are not adequate to stabilize a multibunch electron beam at a low energy and with a high current. In order to combat beam instabilities in the HLS storage ring, active feedback systems including a longitudinal feedback system (LFB) and a transverse feedback system (TFB) will be developed as part of the HLS upgrade project, the HLS-Ⅱ storage ring project. As a key component of the longitudinal bunch-by-bunch feedback system, an LFB kicker cavity with a wide bandwidth and high shunt impedance is required. In this paper we report our work on the design of the LFB kicker cavity for the HLS-Ⅱ storage ring and present the new tuning and optimization techniques developed in designing this high performance LFB kicker. 关 键 词：HLS储存环 反馈系统 优化技术 设计 不稳定性 腔体 合肥光源 朗道阻尼