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TY - CONF AU - Malyshev, O.B. AU - Dumbell, K.D. AU - Gurevich, A.V. AU - Gurran, L. AU - Pattalwar, N. AU - Pattalwar, S.M. AU - Valizadeh, R. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - First Results of Magnetic Field Penetration Measurements on Multilayer S-I-S Structures J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - The performance of superconducting RF cavities made of bulk Nb is limited by a breakdown field of Bp=~200 mT, close to the superheating field for Nb. A potentially promising solution to enhance the breakdown field of the SRF cavities beyond the intrinsic limits of Nb is a multilayer coating suggested in [1]. In the simplest case, such a multilayer may be a superconductor-insulator-superconductor (S-I-S) coating, for example, bulk niobium (S) coated with a thin film of insulator (I) followed by a thin layer of another superconductor (S) which could be e.g. dirty niobium [2]. Here we report the first results of our measurements of field penetration in Nb thin films and Nb-AlN-Nb multilayer samples at 4.2 K using the magnetic field penetration facility designed, built and tested in ASTeC. PB - JACoW CP - Geneva, Switzerland SP - 2245 EP - 2247 KW - SRF KW - cavity KW - niobium KW - target KW - experiment DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-WEPMB057 UR - http://jacow.org/ipac2016/papers/wepmb057.pdf ER -