Neutron irradiation of coated conductors

Details Neutron irradiation of coated conductors Neutron irradiation of coated conductors

2009-08-28

arxiv.org/abs/0908.4175v1

Supercond. Sci. Technol. 23 (2010) 014009

Physics

Condensed Matter

Superconductivity

Scientific paper

Various commercial coated conductors were irradiated with fast neutrons in order to introduce randomly distributed, uncorrelated defects which increase the critical current density, Jc, in a wide temperature and field range. The Jc-anisotropy is significantly reduced and the angular dependence of Jc does not obey the anisotropic scaling approach. These defects enhance the irreversibility line in not fully optimized tapes, but they do not in state-of-the-art conductors. Neutron irradiation provides a clear distinction between the low field region, where Jc is limited by the grain boundaries, and the high field region, where depinning leads to dissipation.

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