Field and current distributions and ac losses in superconducting strips

Details Field and current distributions and ac losses in superconducting strips Field and current distributions and ac losses in superconducting strips

2009-09-07

arxiv.org/abs/0909.1351v1

Phys. Rev. B 80, 184517 (2009)

Physics

Condensed Matter

Superconductivity

13 pages, 11 figures

Scientific paper

In this paper I discuss analytic and numerical calculations of the magnetic-field and sheet-current distributions in superconducting strips of width 2a and arbitrary thickness 2b at the center when the cross section is an ellipse, a rectangle, and a shape intermediate between these limits. Using critical-state theory, I use several methods to determine the functional dependence of the ac transport-current losses upon F = I/Ic, where I is the peak alternating current and Ic is the critical current, and I discuss how this dependence can be affected by the cross-sectional shape, aspect ratio, and a flux-density-dependent critical current density Jc(B).

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