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TY - CONF AU - Sun, Z. AU - Arias, T. AU - Connolly, A.B. AU - Deng, X. AU - Dobson, K.D. AU - Liepe, M. AU - Oseroff, T.E. AU - Porter, R.D. AU - Scholtz, J.M. AU - Sitaraman, N. AU - Thompson, M.O. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Electroplating of Sn Film on Nb Substrate for Generating Nb₃Sn Thin Films and Post Laser Annealing 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 - Controlling film quality of Nb₃Sn is critical to its SRF cavity performance. The state-of-the-art vapor diffusion approach for Nb₃Sn deposition observed surface roughness, thin grain regions, and misfit dislocations which negatively affect the RF performance. The Sn deficiency and non-uniformity at the nucleation stage of vapor deposition is believed to be the fundamental reason to cause these roughness and defects issues. Thus, we propose to pre-deposit a uniform Sn film on the Nb substrate, which is able to provide sufficient Sn source during the following heat treatment for Nb₃Sn nucleation and growth. Here, we demonstrated successful electrodeposition of a low-roughness, dendrite-free, excellent-adhesion Sn film on the Nb substrate. More importantly, we further achieved a uniform, low-roughness (Ra = 66 nm), pure-stoichiometric Nb₃Sn film through thermal treatment of this electroplated Sn film in the furnace. Additionally, we provide preliminary results of laser annealing as a post treatment for epitaxial grain growth and roughness reduction. PB - JACoW Publishing CP - Geneva, Switzerland SP - 51 EP - 54 KW - laser KW - cavity KW - radio-frequency KW - electron KW - HOM DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-MOP014 UR - http://jacow.org/srf2019/papers/mop014.pdf ER -