HOM coupler design for 166.6 MHz SC cavity

A low-frequency superconducting cavity is needed in main accelerators for storage ring light sources with ultralow emittance. A compact 166.6 MHz superconducting proof-of-principle cavity was designed adopting a quarter-wave β = 1 geometry for a High Energy Photon Source (HEPS). It is a 6 GeV diffraction-limited synchrotron light source currently being developed at the Institute of High Energy Physics. The cavity is exceedingly compact in size yet possessing a low resonant frequency. The nearest higher order mode is largely separated from the fundamental, making the cavity an attractive geometry for effective damping of these modes in high current accelerators such as HEPS. The achieved accelerating voltage of 3.0 MV is well beyond the designed 1.5 MV and required 1.2 MV for HEPS operation. High surface electromagnetic fields were reached with excellent rf and mechanical performances, and multipacting barriers were easily processed. This constitutes the first demonstration of a compact low-frequency β = 1 superconducting cavity for HEPS. The design, fabrication, surface preparation, and cryogenic tests of the cavity are presented.

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Design Evolution of the Higher Order-Mode Damping in 166.6-MHz Quarter-Wave $\beta$=1 Superconducting Cavities for HEPS

Zheng,

Zhang,

Meng

et al. 2024

IEEE Trans. Appl. Supercond.

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HOM coupler design for 166.6 MHz SC cavity

Cited by 3 publications

References 1 publication

The mechanical design, fabrication and tests of a 166.6 MHz quarter-wave beta=1 proof-of-principle superconducting cavity for HEPS

The mechanical design, fabrication and tests of a 166.6 MHz quarter-wave beta=1 proof-of-principle superconducting cavity for HEPS

Development and vertical tests of a 166.6 MHz proof-of-principle superconducting quarter-wave beta = 1 cavity

Design Evolution of the Higher Order-Mode Damping in 166.6-MHz Quarter-Wave $\beta$=1 Superconducting Cavities for HEPS

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