Superconducting wire and superconducting coil employing it

Tape-shaped superconducting wires, comprising:

• a substrate;
• and
• a superconducting film layer on said substrate,
• wherein the superconducting film layer comprises a plurality of electrically separated superconducting films with a rectangular cross section and arranged in parallel to form parallel conductors,
• wherein the superconducting film layer on the substrate has slit-shaped grooves between each of the parallel conductors, the slit-shaped grooves being filled with electrically insulating materials, and
• wherein an entire environment around said parallel conductors is coated with the electrically insulating materials.

A superconducting coil, the coil comprising:

• a bobbin;
• tape-shaped superconducting wires coiled as a coil structure in a cylinder winding form around said bobbin, said superconducting wires comprising i) a substrate and ii) a plurality of electrically separated superconducting films on said substrate, the superconducting films each having a rectangular cross section and arranged in parallel to form parallel conductors;
• and
• an electric connecting part at a coil axis end of said coil structure, said connecting part provided in a bundled connection form for connecting conductor elements of the parallel conductors of said superconducting wires as a bundle,
• wherein said superconducting wires are wound i) one or more turns in a coil axis direction and ii) in one or more layers in a radial direction of said coil structure, and
• wherein said coil structure contains a part wherein perpendicular interlinkage magnetic fluxes, acting among various conductor elements of said parallel conductors by a distribution of magnetic fields generated by the superconducting coil, cancel each other.