Keyword: superconducting-magnet
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TUPB059 A Facility for Magnetic Field Penetration Measurements on Multilayer S-I-S Structures experiment, niobium, SRF, data-acquisition 716
 
  • O.B. Malyshev, K.D. Dumbell, L. Gurran, N. Pattalwar, S.M. Pattalwar, R. Valizadeh
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • K.D. Dumbell, S.M. Pattalwar, R. Valizadeh
    Cockcroft Institute, 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
  
  Funding: STFC and US Department of Energy under contract No. DE-SC0010081.
Superconducting RF cavities made of bulk Nb has reached a breakdown field of about 200 mT which is close to the superheating field for Nb. As it was theoretically shown* a multilayer coating can be used to enhance the breakdown field of SRF cavities. The simple example is a superconductor-insulator-superconductor (S-I-S), for example bulk niobium (S) coated with a thin film of insulator (I) followed by a thin layer of a superconductor (S) which could be a dirty niobium**. To verify such an enhancement in a presence of a DC magnetic field at 4.2 K a simple experimental facility was designed, built and tested in ASTeC. The details of experimental setup and results of the measurements will be shown at the conference.
*A. Gurevich, APL 88, 012511 (2006)
**A. Gurevich, AIP Advances, 5, 017112 (2015) 		 
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