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TY - CONF AU - Kleindienst, R. AU - Keckert, S. AU - Knobloch, J. AU - Kugeler, O. ED - Schaa, Volker RW ED - He, Yuan ED - Li, Lu ED - Zhao, Ning TI - Advanced Method to Extract the Surface Resistance From Q0 Measurements J2 - Proc. of SRF2017, Lanzhou, China, July 17-21, 2017 C1 - Lanzhou, China T2 - International Conference on RF Superconductivity T3 - 18 LA - english AB - The quality factor of an RF cavity and the surface resistance are typically related with a constant geometry factor. The implicit assumption made is that the surface resistance is field independent, which is however not observed experimentally in superconducting cavities. The approximation error due to this assumption becomes larger the less homogeneous the magnetic field distribution along the cavity walls is. In this paper we calculate the surface resistance error for different cavity types. An iterative method to correct for this error is presented. PB - JACoW CP - Geneva, Switzerland SP - 867 EP - 869 KW - ion KW - cavity KW - factory KW - HOM KW - quadrupole DA - 2018/01 PY - 2018 SN - 978-3-95450-191-5 DO - 10.18429/JACoW-SRF2017-THPB054 UR - http://jacow.org/srf2017/papers/thpb054.pdf ER -