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arXiv · 1006.3458

Use of 2G coated conductors for efficient shielding of DC magnetic fields

J. -F. Fagnard·M. Dirickx·G. A. Levin·P. N. Barnes·B. Vanderheyden·P. Vanderbemden
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Abstract

This paper reports the results of an experimental investigation of the performance of two types of magnetic screens assembled from YBa2Cu3O7-d (YBCO) coated conductors. Since effective screening of the axial DC magnetic field requires the unimpeded flow of an azimuthal persistent current, we demonstrate a configuration of a screening shell made out of standard YBCO coated conductor capable to accomplish that. The screen allows the persistent current to flow in the predominantly azimuthal direction at a temperature of 77 K. The persistent screen, incorporating a single layer of superconducting film, can attenuate an external magnetic field of up to 5 mT by more than an order of magnitude. For comparison purposes, another type of screen which incorporates low critical temperature quasi-persistent joints was also built. The shielding technique we describe here appears to be especially promising for the realization of large scale high-Tc superconducting screens.

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J. -F. Fagnard, M. Dirickx, G. A. Levin, P. N. Barnes, B. Vanderheyden, P. Vanderbemden. 2010-06-17. Use of 2G coated conductors for efficient shielding of DC magnetic fields. https://doi.org/10.1063/1.3459895

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