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Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring

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Abstract

A radiofrequency (RF) phase modulation method is applied to the Hefei Light Source II storage ring to deeply investigate its longitudinal beam characteristics and improve the beam lifetime. A theoretical analytical model and corresponding experimental measurements of single bunch length and island phenomena are examined. From a series of online machine experiments, we demonstrate that the suitable phase modulation amplitude is 0.02 rad, corresponding to an optimum modulation frequency ranging from 19.6 to 20.7 kHz of the RF system. Furthermore, the overall beam lifetime can be increased by a factor of 2.38 as a result of the beam dilution effect.

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Authors and Affiliations

  1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China

    Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, Fang-Fang Wu, Ping Lu, Tian-Yu Zhou & San-Shuang Jin

Authors
  1. Yun-Kun Zhao
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  2. Bao-Gen Sun
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  3. Ji-Gang Wang
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  4. Fang-Fang Wu
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  5. Ping Lu
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  6. Tian-Yu Zhou
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  7. San-Shuang Jin
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, and Fang-Fang Wu. The first draft of the manuscript was written by Yun-Kun Zhao and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Bao-Gen Sun.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 12075236, 11575181, 11705203, 51627901) and the Anhui Provincial Natural Science Foundation (No. 1808085QA24).

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Zhao, YK., Sun, BG., Wang, JG. et al. Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring. NUCL SCI TECH 32, 1 (2021). https://doi.org/10.1007/s41365-020-00836-0

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  • DOI: https://doi.org/10.1007/s41365-020-00836-0

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