Central RF frequency measurement of the HLS-Ⅱ storage ring

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Jia-Jun Zheng, Yong-Liang Yang, Bao-Gen Sun, Fang-Fang Wu, Chao-Cai Cheng, Kai Tang and Jun-Hao Wei. Central RF frequency measurement of the HLS-Ⅱ storage ring[J]. Chinese Physics C, 2016, 40(4): 047005. doi: 10.1088/1674-1137/40/4/047005
Jia-Jun Zheng, Yong-Liang Yang, Bao-Gen Sun, Fang-Fang Wu, Chao-Cai Cheng, Kai Tang and Jun-Hao Wei. Central RF frequency measurement of the HLS-Ⅱ storage ring[J]. Chinese Physics C, 2016, 40(4): 047005.  doi: 10.1088/1674-1137/40/4/047005 shu
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Received: 2015-08-14
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    Supported by National Natural Science Foundation of China(11105141, 11175173) and the upgrade project of Hefei Light Source

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Central RF frequency measurement of the HLS-Ⅱ storage ring

    Corresponding author: Jia-Jun Zheng,
    Corresponding author: Yong-Liang Yang,
  • 1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
Fund Project:  Supported by National Natural Science Foundation of China(11105141, 11175173) and the upgrade project of Hefei Light Source

Abstract: Central RF frequency is a key parameter of storage rings. This paper presents the measurement of central RF frequency of the HLS-Ⅱ storage ring with the sextupole modulation method. Firstly, the basis of central RF frequency measurement of the electron storage ring is briefly introduced. Then, the error sources and the optimized measurement method for the HLS-Ⅱ storage ring are discussed. The workflow of a self-compiled Matlab script used in central RF frequency measurement is also described. Finally, the results achieved by using two data processing methods to cross-check each other are shown. The measured value of the central RF frequency demonstrates that the circumference deviation of the HLS-Ⅱ storage ring is less than 1 mm.

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