Conceptual Design and Preliminary Verification of a Double-bunch Switchyard for SXFEL

Authors

  • Yongfang Liu Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China https://orcid.org/0000-0002-8711-0581
  • Jin Tong Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China
  • Sheying Li Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China
  • Yizhou Jiang Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China
  • Qibing Yuan Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China
  • Bo Liu Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

DOI:

https://doi.org/10.13052/2025.ACES.J.400210

Keywords:

Beam distribution system, double-bunch separation, kicker magnet, pulsed power supply, septum magnet

Abstract

The Shanghai soft X-ray free-electron laser (SXFEL) is the first X-ray free-electron laser (FEL) user facility in China. To improve the utilization efficiency of the linear accelerator, SXFEL plans to upgrade to double-bunch mode with a bunch time separation of 100 ns and a maximum repetition rate of 50 Hz. A new conceptual beam distribution system is designed to separate the double beam bunch-by-bunch. Conceptual design and prototype implementation of a double-bunch separation system was implemented. The beam distribution system consists of four in-vacuum kicker magnets and one Lambertson septum magnet. This paper presents the design considerations and preliminary verification of a beam bunch distribution system. Distributed magnets and excitation power supply are introduced in detail. The relevant simulation and experimental results of the magnets and pulsed power supply are introducedalso.

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Author Biographies

Yongfang Liu, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Yongfang Liu was born in Shandong, China, in 1987. He received the Ph.D. degree from University of Chinese Academy of Sciences (UCAS), Beijing, China, in 2020. His research interest includes pulsed power supply and pulsed magnet technologies, such as pulsed klystron modulators, linear transformer drivers (LTD), particle accelerator injection and extraction magnet, particle accelerator beam distribution magnet and irreversible electroporation pulsed power supply.

Jin Tong, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Jin Tong graduated from the University of Chinese Academy of Sciences, majoring in Nuclear Technology and Application. Since graduation, he has been engaged in the design of pulse magnets and magnetic measurement systems over years, especially for special magnets used in electron beam injection and extraction systems, such as linear/nonlinear kicker magnets, eddy current septum magnets and Lambertson cutting magnets, which had been designed and researched in large scientific facilities.

Sheying Li, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Sheying Li received her Ph.D. in electrical engineering from Karlsruhe Institute of Technology (KIT), Germany, in 2022. She is currently working in the group of pulse power supplies at Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS). Her research interests mainly include photovoltaic technology for water treatment, energy storage technology, energy management control, and dynamic system control for pulsed power supply.

Yizhou Jiang, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Yizhou Jiang was born in Jiangsu, China, in 1999. He received the master’s degree in electrical engineering from Shanghai Electric Power University in 2024. He is working in Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS).

Qibing Yuan, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Qibing Yuan was born in Sichuan, China, in 1977. He graduated from the University of Science and Technology of China. He received a Ph.D. degree in nuclear technology and applications from Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China, in 2008. He is currently a professor at the Shanghai Advanced Research Institute of the Chinese Academy of Sciences. His research interest focuses on particle accelerator control technology of undulator and pulsed power supply.

Bo Liu, Shanghai Advanced Research Institute Chinese Academy of Sciences, Shanghai 201204, China

Bo Liu received his Ph.D. from Institute of High Energy Physics, Chinese Academy of Sciences in 2005. He is currently a professor at the Shanghai Advanced Research Institute of the Chinese Academy of Sciences. His research interest focuses on particle accelerator based light sources.

References

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Published

2025-02-28

How to Cite

[1]
Y. . Liu, J. . Tong, S. . Li, Y. . Jiang, Q. . Yuan, and B. . Liu, “Conceptual Design and Preliminary Verification of a Double-bunch Switchyard for SXFEL”, ACES Journal, vol. 40, no. 02, pp. 165–171, Feb. 2025.

Issue

2025: Vol 40 Iss 2

Section

Special Issue on ACES-CHINA 2023 Conference

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