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TY - CPAPER AU - Laxdal, R.E. AU - Abidi, S.H. AU - Buck, T.J. AU - Junginger, T. AU - Kiefl, R. AU - Kolb, P. AU - Ma, Y.Y. AU - Yang, L. AU - Yao, Z.Y. TI - Characterization of SRF Materials at the TRIUMF muSR Facility J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - MuSR is a powerful tool to probe local magnetism and hence can be used to diagnose flux penetration in Type-II superconductors. Samples produced at TRIUMF and with collaborators in both coin shaped and ellipsoidal geometries have been characterized by applying either transverse or parallel fields between 0 and 300mT and measuring flux entry as a function of applied field. Samples include Nb treated in standard ways including forming, chemistry, and heat treatments. Further, Nb samples have been doped with Nitrogen and coated with a 2 micron layer of Nb3Sn by collaborators from FNAL and Cornell respectively and measured in three field/geometry configurations. Analysis of the method in particular the effects of geometry and the role of pinning will be presented. Results of the measurements will be presented. PB - JACoW CY - Geneva, Switzerland SP - 205 EP - 209 KW - TRIUMF KW - SRF KW - positron KW - polarization KW - vacuum DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-MOPB050 UR - http://srf2015.vrws.de/papers/mopb050.pdf ER -