Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (5): 257-260 doi: 10.13538/j.1001-8042/nst.20.257-260


Orbit correction algorithm for SSRF fast orbit feedback system

LIU Ming1,2,* YIN Chongxian1 LIU Dekang1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
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LIU Ming, YIN Chongxian, LIU Dekang. Orbit correction algorithm for SSRF fast orbit feedback system.Nuclear Science and Techniques, 2009, 20(5): 257-260     doi: 10.13538/j.1001-8042/nst.20.257-260


A fast orbit feedback system is designed at SSRF to suppress beam orbit disturbance within sub-micron in the bandwidth up to 100 Hz. The SVD (Singular value decomposition) algorithm is applied to calculate the inverse response matrix in global orbit correction. The number of singular eigenvalues will influence orbit noise suppression and corrector strengths. The method to choose singular eigenvalue rejection threshold is studied in this paper, and the simulation and experiment results are also presented.

Key words: Fast orbit feedback system, Singular value decomposition, Shanghai Synchrotron Radiation Facility