ac Losses in a Finite Z Stack Using an Anisotropic Homogeneous-Medium Approximation

Details ac Losses in a Finite Z Stack Using an Anisotropic Homogeneous-Medium Approximation ac Losses in a Finite Z Stack Using an Anisotropic Homogeneous-Medium Approximation

2007-08-29

arxiv.org/abs/0708.4024v1

Supercond. Sci. Technol. 20, 1130-1139 (2007)

Physics

Condensed Matter

Superconductivity

21 pages, 17 figures, accepted by Supercond. Sci. Technol

Scientific paper

10.1088/0953-2048/20/12/008

A finite stack of thin superconducting tapes, all carrying a fixed current I, can be approximated by an anisotropic superconducting bar with critical current density Jc=Ic/2aD, where Ic is the critical current of each tape, 2a is the tape width, and D is the tape-to-tape periodicity. The current density J must obey the constraint \int J dx = I/D, where the tapes lie parallel to the x axis and are stacked along the z axis. We suppose that Jc is independent of field (Bean approximation) and look for a solution to the critical state for arbitrary height 2b of the stack. For c<|x|

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