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TY - CONF AU - Xu, W. AU - Ben-Zvi, I. AU - Blaskiewicz, M. AU - Gao, Y. AU - Holmes, D. AU - Kolb, P. AU - McIntyre, G.T. AU - Porqueddu, R. AU - Smith, K.S. AU - Than, R. AU - Willeke, F.J. AU - Xiao, B. P. AU - Xin, T. AU - Xu, C. AU - Zaltsman, A. ED - Schaa, Volker RW ED - He, Yuan ED - Li, Lu ED - Zhao, Ning TI - Novel HOM Damper Design for High Current SRF Cavities J2 - Proc. of SRF2017, Lanzhou, China, July 17-21, 2017 C1 - Lanzhou, China T2 - International Conference on RF Superconductivity T3 - 18 LA - english AB - ERL-Ring eRHIC aims to build a new high current (50 mA), multi-pass (6 passes) ERL to provide 3-18 GeV electron beams to collide with proton beams from existing RHIC. One critical challenge for eRHIC is to damp HOMs. The average HOM power is up to 8 kW per cavity, and it will get worse when the electron beam spectrum overlaps with cavity HOM spectrum. A novel HOM damping scheme by employing ridge waveguides has been worked out at BNL, which is able to well damp both longitudinal and transversal modes. This paper will describe the design of the HOM damping scheme, including RF design, HOM damping results, progress of prototyping. PB - JACoW CP - Geneva, Switzerland SP - 385 EP - 388 KW - HOM KW - ion KW - GUI KW - cavity KW - SRF DA - 2018/01 PY - 2018 SN - 978-3-95450-191-5 DO - 10.18429/JACoW-SRF2017-TUPB002 UR - http://jacow.org/srf2017/papers/tupb002.pdf ER -