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TY - CPAPER AU - Huque, N.A. AU - Bellavia, S. AU - Clemens, W.A. AU - Daly, E. AU - McIntyre, G.T. AU - Seberg, S.K. AU - Wu, Q. TI - BNL 56 MHz HOM Damper Fabrication at JLab J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - The Higher-Order Mode (HOM) Dampers for the Relativistic Heavy-Ion Collider’s (RHIC) 56 MHz cavity at Brookhaven National Laboratory (BNL) are currently being fabricated at JLab. The coaxial damper is primarily constructed with high RRR niobium, with a combination of niobium and sapphire rings as the filter assembly. Several design changes have been made with respect to the performance of a prototype damper – also fabricated at JLab – which was found to quench at low power. The production dampers are being tuned and tested in the JLab vertical test area (VTA) prior to delivery. Two HOM dampers will be delivered to BNL; they are to be used in the RHIC in November, 2015. This paper outlines the challenges faced in the fabrication and tuning process. PB - JACoW CY - Geneva, Switzerland SP - 1262 EP - 1266 KW - HOM KW - niobium KW - cavity KW - feedback KW - SRF DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB063 UR - http://srf2015.vrws.de/papers/thpb063.pdf ER -