Preliminary study of the higher-harmonic cavity for HLS-Ⅱ  

作　　者：吴丛凤 樊浩 王琳 刘广超 冯光耀 李为民 R.A.Bosch 

机构地区：[1]National Synchrotron Radiation Laboratory,USTC [2]Synchrotron Radiation Center,University of Wisconsin-Madison,3731 Schneider Drive,Stoughton,Wisconsin 53589,USA

出　　处：《Chinese Physics C》2012年第9期891-894,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10675116);Major State Basic Research Development Programme of China(2011CB808301)

摘　　要：A higher-harmonic cavity will be used to increase the beam lifetime and suppress coupled-bunch instabilities for Hefei Light Source-II. In this paper, results simulated by the particle-tracking model confirm that tuning in the harmonic cavity may suppress the parasitic coupled-bunch instabilities. The factors calculated for lifetime improvement are larger than 2.5. The 3rd and 4th harmonic cavities have been designed. In particular, the absorbers and antenna couplers are applied in harmonic cavities to damp the higher order modes. Finally, the 4th harmonic cavity similar to the Duke＇s RF cavity will be used for HLS-II.A higher-harmonic cavity will be used to increase the beam lifetime and suppress coupled-bunch instabilities for Hefei Light Source-II. In this paper, results simulated by the particle-tracking model confirm that tuning in the harmonic cavity may suppress the parasitic coupled-bunch instabilities. The factors calculated for lifetime improvement are larger than 2.5. The 3rd and 4th harmonic cavities have been designed. In particular, the absorbers and antenna couplers are applied in harmonic cavities to damp the higher order modes. Finally, the 4th harmonic cavity similar to the Duke＇s RF cavity will be used for HLS-II.

关 键 词：harmonic cavity INSTABILITIES lifetime improvement HOMs damping 

分 类 号：TL503[核科学技术—核技术及应用]