A high sensitivity tune measurement system for BEPCII  

作　　者：Jun He Yan-feng Sui Yan-hua Lu Yao-yao Du Lin Wang Hui-zhou Ma Yong Li Ying Zhao Ling-da Yu Tao-guang Xu Jun-hui Yue Jian-she Cao 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Radiation Detection Technology and Methods》2022年第1期88-96,共9页辐射探测技术与方法（英文）

基　　金：Funding This work was funded by the Youth Innovation Promotion Association CAS(No.2019013 and Y202005);the National Natural Science Foundation of China(No.11975254).

摘　　要：Background The tune is one of the most important parameters of the storage ring which play a crucial role in the brightness optimization.The synchrotron radiation will suppress the oscillation and make the detection unusual difficulty without any kicker excitation.Purpose A new high sensitivity tune measurement system is developed to show the real-time tune during the colliding.Method Peak diode detectors are used to convert short beam pulses from a button BPM into slowly varying signals.Their DC components,constituting a large background related to beam offsets,are suppressed by series capacitors,while the small signals related to beam oscillations are passed to the subsequent stages for amplification and filtering.Conclusion A direct diode detection technique based on the diode peak hold circuit could increase the sensitivity by hundreds time which gets a clearly tune peak even with synchrotron radiation and bunch-by-bunch feedback damping.

关 键 词：COLLIDER High sensitivity Direct diode detection Real-time tune Red Pitaya 

分 类 号：TL594[核科学技术—核技术及应用]