Segmented superconducting tape having reduced AC losses and method of making
AssigneeLos Alamos National Security, LLC
InventorsStephen Foltyn, Quanxi Jia, Paul Arendt, Terry Holesinger, Haiyan Wang
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Abstract
A superconducting tape having reduced AC losses. The tape has a high temperature superconductor layer that is segmented. Disruptive strips, formed in one of the tape substrate, a buffer layer, and the superconducting layer create parallel discontinuities in the superconducting layer that separate the current-carrying elements of the superconducting layer into strips or filament-like structures. Segmentation of the current-carrying elements has the effect of reducing AC current losses. Methods of making such a superconducting tape and reducing AC losses in such tapes are also disclosed.
Claims47
A method of making a superconducting tape having reduced AC losses, the method comprising the steps of:
- a) providing a tape substrate;
- b) depositing at least one buffer layer on the tape substrate;
- c) depositing a layer of superconducting material on the at least one buffer layer;
- and
- d) forming a plurality of disruptive strips on one of the tape substrate, the at least one buffer layer, and the layer of superconducting material, wherein each of the plurality of disruptive strips is substantially parallel to the current flow direction of the superconducting tape, and wherein the plurality of disruptive strips causes parallel discontinuities in electrical properties of the layer of superconducting material.
A method of reducing AC losses in a superconducting tape, wherein the superconducting tape comprises a tape substrate, at least one buffer layer deposited on the tape substrate, and a superconducting layer deposited on the at least one buffer layer opposite the tape substrate, the method comprising forming a plurality of disruptive strips on one of the tape substrate, the at least one buffer layer, and the superconducting layer, wherein each of the plurality of disruptive strips is substantially parallel to the current flow direction of the superconducting tape, and wherein the plurality of disruptive strips causes parallel discontinuities in electrical properties of the layer of superconducting material that reduce AC losses in the superconducting tape.
A method of making a superconducting tape having reduced AC losses, the method comprising the steps of:
- a) providing a tape substrate;
- b) depositing at least one buffer layer on the tape substrate;
- c) depositing a layer of superconducting material on the at least one buffer layer;
- and
- d) forming a plurality of disruptive strips on one of the tape substrate, the at least one buffer layer, and the superconducting layer, wherein each of the plurality of disruptive strips are substantially parallel to the current flow direction of the superconducting tape, and wherein the plurality of disruptive strips comprises at least one of a topographical feature, a degradation in crystallinity, and a contaminant material that cause parallel discontinuities in electrical properties of the layer of superconducting material that reduces AC losses in the superconducting tape.
A superconducting tape having reduced AC losses, the superconducting tape comprising:
- a) a tape substrate;
- b) at least one buffer layer disposed on the tape substrate;
- c) a superconducting layer disposed on the at least one buffer layer;
- and
- d) a plurality of disruptive strips on one of the tape substrate, the at least one buffer layer, and the superconducting layer, wherein each of the plurality of disruptive strips is substantially parallel to the current flow direction of the superconducting tape, and wherein the plurality of disruptive strips causes parallel discontinuities in electrical properties of the layer of superconducting material that reduce AC losses in the superconducting tape.
The superconducting tape according to claim 29, wherein each of the plurality of disruptive strips comprises at least one of a topographical feature, a degradation in crystallinity, and a contaminant material that causes the discontinuity.
Dependencies are inferred from the claim text.