The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Tian, H. AU - Hall, T.D. AU - Inman, M.E. AU - Lester, M. AU - Musson, J. AU - Phillips, H.L. AU - Radhakrishnan, R. AU - Reece, C.E. AU - Taylor, E.J. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - HF-Free Bi-Polar Electropolishing for Application on Multi-Cell Elliptical Cavities J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - Pulse reversed electropolishing of niobium SRF cavities, using a dilute aqueous H₂SO4 electrolyte without HF yields equivalent RF performance with traditional EP. A pulse reversed electropolishing (BPEP) system has been implemented at Jefferson lab, and applied to single cells, a 7-cell CEBAF C100 cavity, and to 9-cell TESLA-style cavities with upgraded pulse system recently. A systematically mechanistic characterization and understanding of the BPEP process through bench top coupons study and cavities directs a system and operational parameter refinement for BPEP. We present process parameters, removal characterization, and rf performance of the processed cavities. This is the fruit of collaborative work between Jefferson Lab and Faraday Technology, Inc., directed toward the routine commercialization/industrialization of niobium cavity processing. PB - JACoW Publishing CP - Geneva, Switzerland ER -