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TY - CONF AU - Bertucci, M. AU - Bosotti, A. AU - D'Ambros, A. AU - Michelato, P. AU - Monaco, L. AU - Pagani, C. AU - Paparella, R. AU - Rizzetto, D. AU - Rizzi, M. AU - Sertore, D. AU - Visentin, A. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Surface Treatments for the Series Production of ESS Medium Beta Cavities 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 - The surface treatment of ESS 704 MHz medium beta cavities consists of a bulk BCP 200 micron removal, a 10 h 600°C heat treatment and a final 20 micron BCP performed after tank integration. The facility currently employed for the BCP treatment, settled in Ettore Zanon SpA, is here presented, together with the results so far obtained on the first series cavities in terms of frequency sensitivity, removal rate and surface external temperature. The optimization of BCP treatment by a preliminary fluid-dynamical finite element model is also discussed. Some details about the visual inspection procedure and the furnace qualification are also presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 188 EP - 193 KW - cavity KW - recirculation KW - SRF KW - niobium KW - simulation DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-MOP056 UR - http://jacow.org/srf2019/papers/mop056.pdf ER -