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Purpose <p>Following the energy upgrade of the BEPCII collider, a comparative analysis was conducted on the power deposition of synchrotron radiation and higher-order mode beam power on the injection kicker magnets before and after the upgrade. To enhance the operational reliability of the injection kicker magnets, improvements and design optimizations were made to the original scheme. These include replacing the ceramic plate coating for the mirror current path with a more reliable three-metal-strip structure, optimizing the water cooling system for better efficiency, and refining the design of the feedthrough connection structure. This paper also details the development process and measurement results of the three-metal-strip magnets.</p> Methods <p>By changing the structural type of the mirror current path on the kicker magnet, the safety and reliability of the kicker magnets can be increased.</p> Results <p>The impedance and magnetic field measurement results shows that the three-metal-strip structure kicker magnets meet the engineering design requirements.</p> Conclusions <p>The injection kicker magnets adopt a new three-metal-strip structure, which can meet the physical design requirements and have the advantages of safety and reliability.</p>

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Development of three-metal-strip kicker magnets for the injection system of BEPCII upgrade project

  • 期刊论文

  • 发表日期：

    2026年1月17日

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  • Lei Wang,
  • Jinhui Chen,
  • Wen Kang,
  • Yudong Liu,
  • Lihua Huo,
  • Guanwen Wang,
  • Peng Liu

摘要

Purpose

Following the energy upgrade of the BEPCII collider, a comparative analysis was conducted on the power deposition of synchrotron radiation and higher-order mode beam power on the injection kicker magnets before and after the upgrade. To enhance the operational reliability of the injection kicker magnets, improvements and design optimizations were made to the original scheme. These include replacing the ceramic plate coating for the mirror current path with a more reliable three-metal-strip structure, optimizing the water cooling system for better efficiency, and refining the design of the feedthrough connection structure. This paper also details the development process and measurement results of the three-metal-strip magnets.

Methods

By changing the structural type of the mirror current path on the kicker magnet, the safety and reliability of the kicker magnets can be increased.

Results

The impedance and magnetic field measurement results shows that the three-metal-strip structure kicker magnets meet the engineering design requirements.

Conclusions

The injection kicker magnets adopt a new three-metal-strip structure, which can meet the physical design requirements and have the advantages of safety and reliability.