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TY - CPAPER AU - Xu, C. AU - Belomestnykh, S.A. AU - Ben-Zvi, I. AU - Xu, W. TI - Second Harmonic Cavity Design for Synchrotron Radiation Energy Compensator in eRHIC Project J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - eRHIC project requires construction of a FFAG ring to accelerate electrons and connect to the existing ion ring of Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. This new ring will have the same radius as the RHIC ring. Synchrotron radiation lost in the electron ring should be compensated by a CW superconducting radio frequency (SRF) cavity. Here we propose an 845 MHz single cell harmonic cavity. This cavity will experience a high average current (∼0.7 A) passing through it. With this consideration, this cavity design requires optimization to reduce higher order mode power. On the other hand, the cavity will operate at relatively high gradient up to 18 MV/m. Current design requires fundamental couplers to handle 400 kW forward RF power and HOM couplers to extract 2.5 kW HOM power. PB - JACoW CY - Geneva, Switzerland SP - 1052 EP - 1055 KW - cavity KW - HOM KW - impedance KW - linac KW - radiation DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB002 UR - http://srf2015.vrws.de/papers/thpb002.pdf ER -