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Screening magnetic fields by superconductors: A simple model

Caputo, Jean-Guy and Gozzelino, Laura and Laviano, Francesco and Ghigo, Gianluca and Gerbaldo, Roberto and Noudem, Jacques G. and Thimont, Yohann and Bernstein, Pierre Screening magnetic fields by superconductors: A simple model. (2013) Journal of Applied Physics, 114 (23). 233913. ISSN 0021-8979

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Official URL: https://doi.org/10.1063/1.4848015

Abstract

We introduce a simple approach to evaluate the magnetic field distribution around superconducting samples, based on the London equations; the elementary variable is the vector potential. This procedure has no adjustable parameters, only the sample geometry and the London length, λ, determine the solution. This approach was validated by comparing the induction field calculated to the one measured above MgB2 disks of different diameters, at 20 K and for applied fields lower than 0.4 T. The model can be applied if the flux line penetration inside the sample can be neglected when calculating the induction field distribution outside the superconductor. We conclude by showing on a cup-shape geometry how one can design a magnetic shield satisfying a specific constraint.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure d'Ingénieurs de Caen - ENSICAEN (FRANCE)
Other partners > Institut National des Sciences Appliquées de Rouen - INSA (FRANCE)
Other partners > Université de Caen Basse-Normandie (FRANCE)
Other partners > Politecnico di Torino (ITALY)
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Deposited On:07 Apr 2020 08:41

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