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TY - CONF AU - Luo, X. AU - He, T.H. AU - Lao, C.L. AU - Shan, L.J. AU - Shen, X.M. AU - Wang, F. AU - Wu, D. AU - Zhou, K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - HOM Analysis of the 4-cell Superconducting Cavity on CTFEL Facility J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The higher order modes (HOMs) of the 1.3GHz 4-cell cavity on CTFEL facility is analyzed in this paper. The passbands of the HOMs in the 4-cell cavity were simulat-ed, and the most harmful modes were determined. The power of the wakefields was estimated. By microwave test at room temperature, the frequencies of the HOMs were measured, as well as the external Q’s of the HOM cou-plers. Besides, a frequency distribution measurement system was built. The HOM signal excited by beam at 2 K temperature is measured, and some preliminary results are obtained. The measurement techniques and results of the HOM damping performance are presented in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2918 EP - 2920 KW - HOM KW - cavity KW - FEL KW - simulation KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB049 UR - http://jacow.org/ipac2019/papers/weprb049.pdf ER -