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TY - CPAPER AU - Martinello, M. AU - Checchin, M. AU - Grassellino, A. AU - Melnychuk, O.S. AU - Posen, S. AU - Romanenko, A. AU - Sergatskov, D.A. AU - Zasadzinski, J. TI - Trapped Flux Surface Resistance Analysis for Different Surface Treatments J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - The trapped flux surface resistance is one of the main contributions on cavity losses which appears when cavities are cooled in presence of external magnetic field. The study is focused on the understanding of the different parameters which determine the trapped flux surface resistance, and how this change as a function of different surface treatments. The study is performed on 1.3 GHz niobium cavities processed with different surface treatments after the 800 C bake: electro-polishing (EP), 120 C baking, and N-doping varying the time of the Nitrogen exposure. The trapped flux surface resistance normalized for the trapped magnetic flux is then analyzed as a function of the mean free path in order to find the surface treatment which minimized the trapped flux sensitivity. PB - JACoW CY - Geneva, Switzerland SP - 115 EP - 119 KW - cavity KW - niobium KW - resonance KW - superconductivity KW - instrumentation DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-MOPB015 UR - http://srf2015.vrws.de/papers/mopb015.pdf ER -