TY - JOUR
AU1 - Zhang, Xinying
AU2 - Dai, Jin
AU3 - Guo, Lin
AU4 - Huang, Tongming
AU5 - Li, Zhongquan
AU6 - Ma, Qiang
AU7 - Meng, Fanbo
AU8 - Mi, Zhenghui
AU9 - Zhang, Pei
AU1 - Zheng, Hongjuan
AB - Abstract: Superconducting cavities with low RF frequencies and heavy damping of higher order modes (HOM) are desired for the main accelerator of High Energy Photon Source (HEPS), a 6 GeV synchrotron light source promising ultralow emittance currently under construction in Beijing. A compact 166.6 MHz superconducting cavity was proposed adopting a quarter-wave beta=1 geometry. Based on the successful development of a proof-of-principle cavity, a HOM-damped 166.6 MHz compact superconducting cavity was subsequently designed. A ferrite damper was installed on the beam pipe to reduce HOM impedance below the stringent threshold of coupled-bunch instabilities. Being compact, RF field heating on the cavity vacuum seal was carefully examined against quenching the NbTi flange. The cavity was later dressed with a helium vessel and the tuning mechanism was also realized. Excellent RF and mechanical properties were eventually achieved. Finally, the two-cavity string was designed to ensure smooth transitions among components and proper shielding of synchrotron light. This paper presents a complete design of a fully dressed HOM-damped low-frequency beta=1 superconducting cavity for HEPS.
TI - Design of a HOM-Damped 166.6 MHz Compact Quarter-Wave beta=1 Superconducting Cavity for High Energy Photon Source
JF - Physics
DA - 2021-09-14
UR - https://www.deepdyve.com/lp/arxiv-cornell-university/design-of-a-hom-damped-166-6-mhz-compact-quarter-wave-beta-1-zISe7OdIt4
VL - 2021
IS - 2109
DP - DeepDyve
ER -