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.
@article{arxiv.1006.3458,
title = {Use of 2G coated conductors for efficient shielding of DC magnetic fields},
author = {J. -F. Fagnard and M. Dirickx and G. A. Levin and P. N. Barnes and B. Vanderheyden and P. Vanderbemden},
journal= {arXiv preprint arXiv:1006.3458},
year = {2015}
}