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TY - CPAPER AU - Pudasaini, U. AU - Eremeev, G.V. AU - Kelley, M.J. AU - Reece, C.E. TI - Local Composition and Topography of Nb3Sn Diffusion Coatings on Niobium J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - The potential for energy savings and for increased gradient continues to bring attention to Nb3Sn-coated niobium as a future SRF cavity technology. We prepared these materials by vapor diffusion coating on polycrystalline and single crystal niobium. The effect of changing substrate preparation, coating parameters and post-treatment were examined by AFM and SEM/EDS. The AFM data were analyzed in terms of power spectral density (PSD). We found little effect of pre-coating topography on the result. The PSD’s show some surprising kinship to those obtained from BCP-treated surfaces. SEM/EDS revealed no composition non-uniformities at the micron scale. PB - JACoW CY - Geneva, Switzerland SP - 703 EP - 707 KW - niobium KW - cavity KW - electron KW - site KW - accelerating-gradient DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-TUPB054 UR - http://srf2015.vrws.de/papers/tupb054.pdf ER -