Design and cold test of S-BAND cavity BPM for HLS

作     者：LUO Qing SUN BaoGen JIA QiKa HE DuoHui FANG Jia 

作者机构：National Synchrotron Radiation LaboratorySchool of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230029China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2011年第54卷第S2期

页      面：292-295页

核心收录：

学科分类：07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10875117 and 11005106) National "985 Project" (Grnat No. 173123200402002) China Postdoctoral Science Foundation (Grant No. 20100470853) "the Fundamental Research Funds for the Central Universities" 

主　　题：cavity BPM re-entrant cut-through waveguide cold test wire scanning resolution cross-talk 

摘      要：An S-band cavity BPM is designed for a new injector in National Synchrotron Radiation Laboratory. A re-entrant position cavity is tuned to the TM110 mode as position cavity. Cut-through waveguides are used as pickups to suppress the monopole signal. Theoretical resolution of this design is 31 nm. A prototype cavity BPM system is manufactured for off-line cold tests. The wire scanning method is used to calibrate the BPM and estimate the performance of the on-line BPM system. A cross-talk problem has been detected during the cold test. Racetrack cavity BPM design can be used to suppress the cross-talk. With the nonlinear effect being ignored, transform matrix can be used to correct cross-talk. Analysis of cold test results shows that the position resolution of prototype BPM is better than 3 μm.