JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Zhang, P. AU - Dai, J. AU - Guo, L. AU - Huang, T.M. AU - Li, Z.Q. AU - Lin, H.Y. AU - Ma, Q. AU - Meng, F. AU - Mi, Z.H. AU - Wang, Q.Y. AU - Zhang, X.Y. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Development and Vertical Tests of a 166.6-MHz Proof-of-Principle Superconduting β = 1 Quarter-Wave Cavity for HEPS J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - Low-frequency superconducting cavities are needed in main accelerators for storage ring light sources with ultralow emittance. Therefore, a compact 166.6-MHz superconducting proof-of-principle cavity was designed for the High Energy Photon Source (HEPS) in China by adopting a quarter-wave geometry with β=1*. The cavity is compact in size yet possessing a low resonant frequency. The nearest higher order mode is significantly separated from the fundamental mode, making the cavity attractive for high-current accelerators such as HEPS. The achieved accelerating voltage of 3.0 MV is well beyond the designed 1.5 MV and high surface electromagnetic fields were reached with excellent RF and mechanical performances. 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 will be presented. PB - JACoW Publishing CP - Geneva, Switzerland ER -