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TY - CONF AU - Lobo, S.N. AU - Liepe, M. AU - Oseroff, T.E. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Magnetic Field Mapping System for Cornell Sample Host Cavity 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 - Dissipation due to flux trapping is a persistent problem experienced in SRF cavity testing and cryomodule operation. This work addresses accurately and cheaply measuring magnetic fields in a cryostat without using delicate and expensive fluxgate magnetometers. Anisotropic Magnetoresistive (AMR) magnetic field sensors were investigated for the detection of small fields in a cryogenic environment. Initial development of instrumentation using 16 AMR sensors is presented for the purpose of measuring magnetic fields perpendicular the normal of a 5" diameter sample plate on the Cornell sample host cavity. PB - JACoW Publishing CP - Geneva, Switzerland SP - 961 EP - 963 KW - cavity KW - SRF KW - monitoring KW - cryomodule KW - radio-frequency DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP046 UR - http://jacow.org/srf2019/papers/thp046.pdf ER -