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TY - CONF AU - Xu, C. AU - Ben-Zvi, I. AU - Hao, Y. AU - Petrushina, I. AU - Ptitsyn, V. AU - Xu, W. ED - Schaa, Volker RW ED - Petit-Jean-Genaz, Christine ED - Ko, In Soo ED - Kim, Dong Eon ED - Kim, Kyung Sook TI - Trapped Modes Study and BBU Analysis in the 5-Cell 650 MHz Cavity J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - eRHIC project is a future electron-hadron collider proposed at BNL. The proposed electron accelerator will generate up to 20 GeV polarized electrons which will collide with proton beams with energy up to 250 GeV. The proposed collider will deliver electron-nucleon luminosity of 10³³- 10³⁴ cm⁻² ses^{−1}. A superconducting RF (SRF) 5-cell elliptical cavity will be utilized in electron accelerator. This paper presents a study of higher-order modes (HOM) for this 647 MHz SRF cavity. Different types of HOM modes and their BBU instabilities were investigated for frequencies up to 3.2 GHz. Threshold current values of beam breakup are estimated by GBBU code. Further improvement on this threshold current has been explored and discussed. PB - JACoW CP - Geneva, Switzerland SP - 2529 EP - 2531 KW - HOM KW - cavity KW - impedance KW - electron KW - damping DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-WEPMW042 UR - http://jacow.org/ipac2016/papers/wepmw042.pdf ER -