Author: Hocker, A.
Paper Title Page
WEPMB023 Hydroforming SRF Three-cell Cavity from Seamless Niobium Tube 2170
  • M. Yamanaka, T. Dohmae, H. Inoue, G.-T. Park, K. Umemori
    KEK, Ibaraki, Japan
  • A. Hocker
    Fermilab, Batavia, Illinois, USA
  • T. Tajima
    LANL, Los Alamos, New Mexico, USA
  We are developing the manufacturing method for superconducting radio frequency (SRF) cavities by using a hydroforming instead of using conventional electron beam welding. We expect higher reliability and reduced cost with hydroforming. For successful hydroforming, high-purity seamless niobium tubes with good formability as well as advancing the hydroforming technique are necessary. Using a seamless niobium tube from ATI Wah Chang, we were able to successfully hydroform a 1.3 GHz three-cell TESLA-like cavity and obtained an Eacc of 32 MV/m. A barrel polishing process was omitted after the hydroforming. The vertical test was carried out with very rough inside surface. We got amazing and interesting result.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMB023  
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