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Bunch-by-bunch beam size measurement during injection at Shanghai Synchrotron Radiation Facility

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Abstract

Fast beam profile measurement is important in fast beam dynamic behavior investigations. A bunch-by-bunch beam size measurement system, which is presently used to measure horizontal profile, has been developed at the Shanghai Synchrotron Radiation Facility (SSRF) and is capable of measuring bunches within a separation of 2 ns. The system is based on a direct-imaging optical system and high-speed photomultiplier array detector. A high-bandwidth linear signal amplifier and acquisition module have also been designed to process bunch-by-bunch multi-channel signals from the detector. The software resampling technique and principal component analysis method were developed to obtain the synchronized data and enhance the signal-to-noise ratio. The fast injection of transients was successfully captured and analyzed. Moreover, the bunch-by-bunch positions and sizes exhibited strong oscillation after the injection at the horizontal betatron oscillation frequency of the SSRF storage ring, and this demonstrated the bunch-by-bunch measurement capability of our system.

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Acknowledgements

The authors thank Dr. De-Chong Zhu from Institute of High Energy Physics (IHEP) for his suggestion with regard to overcoming the effect of the Be mirror distortion. We also thank the operation team of SSRF for its assistance in conducting the beam experiment.

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Han-Jiao Chen, Jie Chen, Bo Gao & Yong-Bin Leng

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Han-Jiao Chen, Bo Gao & Yong-Bin Leng

Authors
  1. Han-Jiao Chen
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  2. Jie Chen
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  4. Yong-Bin Leng
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Correspondence to Yong-Bin Leng.

Additional information

This work was supported by the National Natural Science Foundation of China (No. 11375255).

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Chen, HJ., Chen, J., Gao, B. et al. Bunch-by-bunch beam size measurement during injection at Shanghai Synchrotron Radiation Facility. NUCL SCI TECH 29, 79 (2018). https://doi.org/10.1007/s41365-018-0420-2

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