Speaker
Lin Guo
(University of Chinese Academy of Sciences)
Description
The storage ring of the High Energy Photon Source will be driven by five higher-order-mode-damped 166.6 MHz beta=1 quarter-wave superconducting cavities operating at 4 K. Three prototype cavities were manufactured in Beijing and the surface preparations were conducted in Ningxia and Beijing. The cavities were subsequently vertical tested at PAPS in Huairou (Beijing). The cavity Q0 at design voltage of 1.5 MV reached 3.8×109 at 4 K, exceeding the design goal of 1×109. One cavity was subsequently welded with a helium jacket and vertical tested at 2 K achieving an RF performance comparable to the undressed cavities. No chemical polishing was conducted for the jacketed cavity.
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Primary author
Lin Guo
(University of Chinese Academy of Sciences)
Co-authors
Fanbo Meng
(Institute of High Energy Physics)
Haiying Lin
(Institute of High Energy Physics)
Jin Dai
(Institute of High Energy Physics)
Pei Zhang
(Institute of High Energy Physics)
Xinying Zhang
(Institute of High Energy Physics)
Zheng Mi
(Chinese Academy of Sciences)
