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TY - UNPB AU - Dangwal Pandey, A. AU - Bate, C. AU - Keller, T.F. AU - Noei, H. AU - Reschke, D. AU - Schaffran, J. AU - Semione, G.D.L. AU - Stierle, A. AU - Vonk, V. AU - Weise, H. AU - Wenskat, M. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Surface Analysis of Niobium After Thermal/Gas Treatments via Samples - Review 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 - Thermal treatments of SRF Nb cavities - including the well-established 120°C bake and the recently reported N-infusion - are shown to improve the cavity performance significantly; however, the underlying physical phenomenon is not fully understood. A short review will be presented on surface characterization of niobium material subjected to various thermal and gas exposure protocols and how the findings correlate with observed SRF properties. Moreover, recent results obtained on single-crystal Nb samples - heated in different vacuum environments and characterised by means of X-ray photoelectron spectroscopy and grazing-incidence X-ray diffraction, electron microscopy, energy dispersive X-ray spectroscopy and time-of-flight secondary ion mass spectroscopy will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland ER -