Design and fabrication of button-style beam position monitors for the HEPS synchrotron light facility  

作　　者：Jun He Yan-Feng Sui Yong Li Xu-Hui Tang Lin Wang Fang Liu Zhi Liu Ling-Da Yu Xiao-Yu Liu Tao-Guang Xu Jian-She Cao Jun-Hui Yue 

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

出　　处：《Nuclear Science and Techniques》2022年第11期61-78,共18页核技术（英文）

基　　金：supported by the Youth Innovation Promotion Association CAS (Nos. 2019013 and Y202005);the National Natural Science Foundation of China (No. 11975254)

摘　　要：At the High Energy Photon Source (HEPS),a high orbital stability of typically 10% of the beam size and angular divergence must be achieved.The beam size at the insertion devices is 10μm horizontally and 1μm vertically,which implies that the beam orbit must be stabilized to the sub-micrometer level.This results in stringent tolerance and quality control requirements for the series production of beam position monitor (BPM) pickups.In this study,analytical formulas were used and CST simulations were performed to analyze the effects of the mechanical tolerances of BPM pickups on beam position measurement.The results of electromagnetic?eld simulations revealed how various mechanical errors,such as button size and location accuracy,as well as the related button capacitance,exert different in?uences on the beam position measurement.The performance of an actual BPM pickup was measured,along with an assessment of the error on the beam position measurement.Additionally,a wake?eld analysis,including an investigation of trapped resonant modes and related thermal deformation,was conducted.

关 键 词：High energy photon source BPM Error CST Tolerances 

分 类 号：TL50[核科学技术—核技术及应用]