LINAC2024 - Proceedings
Chicago, IL, USA
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URLhttps://doi.org/10.18429/JACoW-LINAC2024-THPB081
TitleRecent progress on HF-free surface treatment by bipolar pulsed electropolishing for SRF Nb cavities
Authors
  • M. Ge, A. Valente-Feliciano, H. Tian, J. Musson, M. Lester, N. Brock
    Thomas Jefferson National Accelerator Facility
  • E. Stallworth
    Jefferson Lab
AbstractThe bipolar pulsed electropolishing (BPEP), due to its HF-free feature, can offer much safer, more environmentally friendly, and lower-cost operation compared to the conventional electropolishing, using concentrated HF and H2SO4 as electrolyte. Jefferson Lab has developed the BPEP system using diluted H2SO4 only for implementing final surface processing of niobium SRF cavities, including single cells, 7-cell CEBAF C100 cavity, and 9-cell TESLA-style cavities. The BPEP-treated cavity, followed by 120°C baking, has achieved an accelerating gradient (Eacc) of 37 MV/m with a quality factor (Q0) above 1e10 at 2K, which demonstrated the success of the system's development. The detailed BPEP parameter optimization and study of the surface engineering by BPEP will also be presented.
Paperdownload: THPB081.pdf
CiteBibTeX, LaTeX, Text/Word, RIS, EndNote
Conference32nd Linear Accelerator Conference (LINAC2024)
Series
LocationChicago, IL, USA
Date25-30 Aug 2024
PublisherJACoW Publishing, Geneva, Switzerland
Editorial BoardKelly Jaje (ANL), Kip Bishofberger (LANL), Ryan Brody (ANL), Gustavo Bruno (ANL), Jan Chrin (PSI), Cathy Eyberger (ANL), Maggie Montes (SLAC), Denise Skiadopoulos (ANL), Ling Wang (MSU/FRIB), Kent Wootton (ANL)
Online ISBN978-3-95450-219-6
Online ISSN2226-0366
Received24 August 2024
Revised26 August 2024
Accepted26 August 2024
Issued23 October 2024
DOI10.18429/JACoW-LINAC2024-THPB081
Pages790-792
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