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

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

doi:10.1007/s41365-020-00836-0

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

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | Updated：2021-02-22

- Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring
- Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring
- Nuclear Science and Techniques 2021年32卷第1期文章编号：1
- Affiliations：
  
  1.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
- Author bio：
  
  Corresponding author, bgsun@ustc.edu.cn
- Funds：
  
  National Natural Science Foundation of China(12075236;11575181;11705203;51627901);Anhui Provincial Natural Science Foundation(1808085QA24)
- DOI：10.1007/s41365-020-00836-0
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Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, 等. Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring[J]. Nuclear Science and Techniques, 2021,32(1):1

Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, et al. Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring[J]. Nuclear Science and Techniques, 2021,32(1):1
Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, 等. Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring[J]. Nuclear Science and Techniques, 2021,32(1):1 DOI： 10.1007/s41365-020-00836-0.

Yun-Kun Zhao, Bao-Gen Sun, Ji-Gang Wang, et al. Effective improvement of beam lifetime based on radiofrequency phase modulation at the HLS-II storage ring[J]. Nuclear Science and Techniques, 2021,32(1):1 DOI： 10.1007/s41365-020-00836-0.

摘要

Abstract

A radiofrequency (RF) phase modulation method is applied to the Hefei Light Source II (HLS-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.

关键词

Keywords

Phase modulationAmplitudeBeam lifetimeLongitudinal beam characteristicsBeam dilutionIsland

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