Low ac loss filamentary coated superconductors
AssigneeAmerican Superconductor Corporation
InventorsCornelis Thieme, Martin Rupich, John Scudiere, Oleg Chevtchenko
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Abstract
An article having low ac loss includes an elongated substrate having a length and a width; and a plurality of filaments comprising an oxide superconductor extending substantially along the length of the elongated substrate and spaced apart from one other filaments across the width of the elongated substrate, wherein at least one filament crosses over at least one other filament such that the at least one filament occupies a first position across the width of the elongated substrate before the crossover and a second position across the width of the elongated substrate after crossover.
Claims48
An article comprising:
- an elongated substrate comprising a textured surface and having a length and a width;
- and
- a plurality of filaments comprising an oxide superconductor extending substantially along the length of the elongated substrate and spaced apart from one other filaments across the width of the elongated substrate,
- wherein at least one filament crosses over at least one other filament such that the at least one filament occupies a first position across the width of the elongated substrate before the crossover and a second position across the width of the elongated substrate after crossover.
The article of claim 8, wherein the medium to high resistivity material is selected from the group consisting of copper-nickel alloy, nickel alloys and stainless steel.
The article of claim 31, further comprising a stabilizer layer disposed on the cap layer.
An article comprising:
- an elongated substrate having a length and a width;
- and
- a plurality of filaments comprising an oxide superconductor extending substantially along the length of the elongated substrate and spaced apart from one another across the width of the elongated substrate,
- wherein the plurality of filaments is periodically shifted in the same direction across the width of the elongated substrate by about one filament width and wherein a filament at a lower edge of the elongated substrate is directed to a top filament position at an upper edge of the elongated substrate through a conductive bridge.
A method of making a multifilamentary article comprising:
- providing a layer of oxide superconductor or precursor thereof on a substrate;
- treating the layer to form filaments, wherein at least one of the filaments is discontinuous;
- and
- joining the ends of the discontinuous filament using a conducting crossover bridge.
Dependencies are inferred from the claim text.