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TY - CONF AU - Wu, Q. AU - Ben-Zvi, I. AU - Verdú-Andrés, S. AU - Xiao, B. P. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Higher Order Mode Coupling Options for the eRHIC Crab Cavity J2 - Proc. of IPAC2018, Vancouver, BC, Canada, 29 April-04 May 2018 CY - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - The eRHIC crab cavity adopts the double quarter wave structure developed at Brookhaven National Lab for the LHC Hi-Lumi upgrade crab cavities. The cavity's fundamental mode is at 338 MHz with the first higher order mode more than 180 MHz above that. We looked into the higher order mode distribution up to 2 GHz, and considered various locations and geometries of the coupling scheme. The cylindrical outer shell of the cavity allowed various possibilities for coupler port openings on all the walls, which were difficult for the narrow waist of the LHC double quarter wave crab cavities. Beam pipe absorbers are also options for simpler high frequency modes damping. Some preliminary high pass filter design will also be discussed in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 121 EP - 124 KW - cavity KW - HOM KW - damping KW - coupling KW - impedance DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - DOI: 10.18429/JACoW-IPAC2018-MOPMF020 UR - http://jacow.org/ipac2018/papers/mopmf020.pdf ER -