Author: Lester, M.
Paper Title Page
HF-Free Bi-Polar Electropolishing for Application on Multi-Cell Elliptical Cavities  
  • H. Tian, M. Lester, J. Musson, H.L. Phillips, C.E. Reece
    JLab, Newport News, Virginia, USA
  • T.D. Hall, M.E. Inman, R. Radhakrishnan, E.J. Taylor
    Faraday Technology, Inc., Clayton, Ohio, USA
  Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC0506OR23177
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.
slides icon Slides FRCAB1 [4.394 MB]  
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