Band-shaped superconducting element with improved self-protection in case of quenching

摘要

A superconducting element (1) has a metallic substrate (2), an insulating layer (3), a superconductor layer (5) and a metallic protective layer (6), wherein the insulating layer (3) is arranged between the substrate (2) and the superconductor layer (5). In cross-section of the superconducting element (1), the insulating layer (3) extends at both ends past the area (BSL) of the substrate (2) covered by the superconductor layer (5) to galvanically separate the superconductor layer (5) and the metallic protective layer (6) from the substrate (2). The thickness D of the insulating layer (3) is selected in such a fashion that the superconducting element (1) has a transverse breakdown voltage between the metallic substrate (2) and both the superconductor layer (5) as well as the metallic protective layer (6) of at least 25 V. The superconducting element has a reduced risk of being damaged in case of a quench.

主权项

1. A superconducting element comprising:
a metallic substrate; a superconductor layer; a metallic protective layer; and an insulating layer disposed between said substrate and said superconductor layer, wherein, in cross-section of the superconducting element, said insulating layer extends at both ends thereof past an area of said substrate covered by said superconductor layer to galvanically separate said superconductor layer and said metallic protective layer from said substrate, said insulating layer thereby having a thickness which is selected in such a fashion that the superconducting element has a transverse breakdown voltage between said metallic substrate and both said superconductor layer as well as said metallic protective layer of at least 25 V, wherein said metallic protective layer contacts said insulating layer.