Author: Gurran, L.
Paper Title Page
WEPMB057 First Results of Magnetic Field Penetration Measurements on Multilayer S-I-S Structures 2245
  • O.B. Malyshev, K.D. Dumbell, L. Gurran, N. Pattalwar, S.M. Pattalwar, R. Valizadeh
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • A.V. Gurevich
    ODU, Norfolk, Virginia, USA
  • L. Gurran
    Lancaster University, Lancaster, United Kingdom
  • L. Gurran
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • O.B. Malyshev, S.M. Pattalwar, R. Valizadeh
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  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.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMB057  
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