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TY - CPAPER AU - Martinello, M. AU - Checchin, M. AU - Grassellino, A. AU - Melnychuk, O.S. AU - Romanenko, A. AU - Sergatskov, D.A. AU - Zasadzinski, J. TI - Magnetic Flux Expulsion in Horizontally Cooled Cavities J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - The cool down details of superconducting accelerating cavities are crucial parameters that have to be optimize in order to obtain very high quality factors. The temperature all around the cavity is monitored during its cool down across the critical temperature, in order to visualize the different dynamics of fast and slow cool-down, which determine considerable difference in terms of magnetic field expulsion and cavity performance. The study is performed placing a single cell 1.3 GHz elliptical cavity perpendicularly to the helium cooling flow, which is representative of how SRF cavities are cooled in an accelerator. Hence, the study involves geometrical considerations regarding the cavity horizontal configuration, underling the different impact of the various magnetic field components on the surface resistance. Experimental data also proves that under established conditions, flux lines are concentrated at the cavity top, in the equatorial region, leading to temperature rise. PB - JACoW CY - Geneva, Switzerland SP - 110 EP - 114 KW - cavity KW - interface KW - SRF KW - distributed KW - simulation DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-MOPB014 UR - http://srf2015.vrws.de/papers/mopb014.pdf ER -