Front-end signal analysis of the transverse feedback system for SSRF

Front-end signal analysis of the transverse feedback system for SSRF 1 first-author 1 1 1 corresp Corresponding author. E-mail address: yekairong@sinap.ac.cn Corresponding author. E-mail address: yekairong@sinap.ac.cn yekairong@sinap.ac.cn Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Multi-bunch instabilities degrade beam quality through increased beam emittance, energy spread and even cause beam loss. A feedback system is used to suppress multi-bunch instabilities associated with resistive wall of the beam ducts, cavity-like structures, and trapped ions. A digital TFS (Transverse Feedback System) is in construction at the SSRF (Shanghai Synchrotron Radiation Facility), which is based on the latest generation of FPGA (Field Programmable Gate Array) processor. Before we get such FPGA digital board, investigation and simulation of the front-end were done in the first place. The signal flow was analyzed by SystemView. Construction and optimization of the entire system is our next goal. TFS Front end circuits SystemView Simulation References Xu H J , Zhao Z T . Nucl Sci Tech , 2008 , 19 : 1 - 6 . Nucl Sci Tech Fox J . Feedback Systems for synchrotron light sources . Invited talk at the ESRF Workshop on Mastering Beam Instabilities in Synchrotron Light Sources , Grenoble, France , March 2000 . Feedback Systems for synchrotron light sources Kube G . Sensitivity estimation for the PETRA-III beam position monitors based on a boundary element method. Technical Note , DESY , Hamburg, Germany , January 2007 . Sensitivity estimation for the PETRA-III beam position monitors based on a boundary element method. Technical Note Kube G , Werner M . Signal level calculation for the PETRA III beam position monitor system . Proc. of DIPAC , Venice, Italy , 2007 . Signal level calculation for the PETRA III beam position monitor system Olmos A , Pérez F , Rehm G , et al . MATLAB code for BPM button geometry computation . Proc. of DIPAC . Venice, Italy , 2007 . MATLAB code for BPM button geometry computation User guide for Systemview [Z]. Elanix Corporation , 2003 . User guide for Systemview Nakamura T . Transverse bunch by bunch feedback system for the SPring-8 storage ring . Proc. of EPAC , Lucerne, Switzerland , 2004 . Transverse bunch by bunch feedback system for the SPring-8 storage ring Zhang J J , Qiao C , Liu W Y , et al . J Univ Sci Tech China , 2005 , 35 : 227 - 231 (in Chinese) . J Univ Sci Tech China 10.1016/S1001-8042(09)60003-8 TL506 2008-05-07 2008-10-20 2021-01-19 2008 Nuclear Science and Techniques 05 19