JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Wenskat, M. AU - Bate, C. AU - Butterling, M. AU - Cizek, J. AU - Hillert, W. AU - Hirschmann, E. AU - Liedke, M.O. AU - Reschke, D. AU - Schaffran, J. AU - Semione, G.D.L. AU - Steder, L. AU - Stierle, A. AU - Wagner, A. AU - Weise, H. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Vacancy-Hydrogen Dynamics and Magnetic Impurities During Mid-T Bake J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - Positron annihilation measurements allow to study the hydrogen interaction with vacancies in a crystal lattice. Furthermore, the 3/2 ratio of the positronium annihilation can be used to identify local magnetic impurities in thin layers. Dynamic studies of these properties in annealing studies up to 300°C will be presented. The discussion is accompanied by X-ray reflectivity studies performed on single crystal samples to study the niobium oxide dissolution. The dynamics of magnetic impurities during a Mid-T bake will be presented, put into the context of cavity studies and a potential link to rf properties will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 342 EP - 348 KW - cavity KW - niobium KW - lattice KW - positron KW - interface DA - 2022/10 PY - 2022 SN - 2673-5504 SN - 978-3-95450-233-2 DO - doi:10.18429/JACoW-SRF2021-TUOFDV03 UR - https://jacow.org/srf2021/papers/tuofdv03.pdf ER -