Development of a low-loss magnetic-coupling pickup for 166.6-MHz quarter-wave beta=1 superconducting cavities

Tong-Ming Huang; Pei Zhang; Zhong-Quan Li; Xin-Ying Zhang; Hai-Ying Lin; Qiang Ma; Fan-Bo Meng; Wei-Min Pan

doi:10.1007/s41365-020-00795-6

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Development of a low-loss magnetic-coupling pickup for 166.6-MHz quarter-wave beta=1 superconducting cavities

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | Updated：2021-01-26

- Development of a low-loss magnetic-coupling pickup for 166.6-MHz quarter-wave beta=1 superconducting cavities
- Nuclear Science and Techniques Vol. 31, Issue 9, Article number: 87(2020)
- Affiliations：
  
  1.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  2.Key Laboratory of Particle Acceleration Physics and Technology, IHEP, CAS, Beijing 100049, China
  3.School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  Corresponding author, zhangpei@ihep.ac.cn
- Funds：
- DOI：10.1007/s41365-020-00795-6
  CLC：
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Tong-Ming Huang, Pei Zhang, Zhong-Quan Li, et al. Development of a low-loss magnetic-coupling pickup for 166.6-MHz quarter-wave beta=1 superconducting cavities. [J]. Nuclear Science and Techniques 31(9):87(2020)
DOI：

Tong-Ming Huang, Pei Zhang, Zhong-Quan Li, et al. Development of a low-loss magnetic-coupling pickup for 166.6-MHz quarter-wave beta=1 superconducting cavities. [J]. Nuclear Science and Techniques 31(9):87(2020) DOI： 10.1007/s41365-020-00795-6.

摘要

Abstract

166.6-MHz quarter-wave ,β,=1 superconducting cavities have been adopted for the High Energy Photon Source, a 6-GeV diffraction-limited synchrotron light source currently under construction. A large helium jacket was required to accommodate the enlarged cavity beam pipe for the heavy damping of higher order modes; the original electric-probe pickup thus becomes inevitably long with unfavorable mechanical properties. Relocated to an existing high-pressure-rinsing port, a magnetic-loop pickup was designed, characterized by low radio-frequency and cryogenic losses and being multipacting free and insensitive to manufacturing and assembly tolerances. The consequent removal of the original pickup port from the cavity largely simplified the helium jacket fabrication and may also reduce cavity contamination. This paper presents a comprehensive design of a low-loss magnetic-coupling pickup for quarter-wave ,β,=1 superconducting cavities. The design can also be applied to other non-elliptical structures.

关键词

Keywords

PickupMagnetic couplingQuarter-wave cavitySuperconducting cavityLow lossSynchrotron light source

references

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