An oxide superconductor according to an embodiment includes an oxide superconducting layer includes a single crystal having a continuous perovskite structure containing at least one rare earth element selected from the group consisting of yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, barium, and copper, containing praseodymium in a part of the site of the rare earth element in the perovskite structure, and having a molar ratio of praseodymium of 0.00000001 or more and 0.2 or less with respect to the sum of the at least one rare earth element and praseodymium; fluorine in an amount of 2.0×10.sup.15 atoms/cc or more and 5.0×10.sup.19 atoms/cc or less; and carbon in an amount of 1.0×10.sup.17 atoms/cc or more and 5.0×10.sup.20 atoms/cc or less.

A cooled system includes an enclosure having an outer surface and an inner surface comprising a cooled enclosed area, multiple cable brackets thermally coupled to the outer surface of the enclosure, each cable bracket including a first surface conforming to the outer surface of the enclosure and an opening therethrough sized to hold a cable and conduct heat from the cable to the outer surface of the enclosure.

A superconducting power cable system, including: a superconducting power cable including a cryostat, a first cooling station, a second cooling station, wherein the superconducting power cable extends between the first cooling station and the second cooling station, wherein the first cooling station is configured to pump cooling fluid into the cryostat in a first direction towards the second cooling station and the second cooling station is configured to pump cooling fluid into the cryostat in a second direction, opposite to the first direction, towards the first cooling station, an access pipe assembly arranged between the first cooling station and the second cooling station, the access pipe assembly extending into the cryostat for tapping cooling fluid flowing from the first cooling station and the second cooling station from the cryostat, and a return pipe structure arranged externally to the superconducting power cable, the return pipe structure connecting the access pipe assembly to the first cooling station and to the second cooling station, and providing a respective return cooling fluid line from the cryostat through the access pipe assembly to the first cooling station and to the second cooling station.

In various embodiments, superconducting wires incorporate diffusion barriers composed of Nb alloys or Nb—Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.

A segment of a field coil, a toroidal field coil, and a method of manufacturing is provided. The segment of a field coil is for use in a superconducting electromagnet. The segment includes an assembly for carrying electrical current in a coil of a magnet. The assembly includes a pre-formed housing comprising a channel configured to retain high temperature superconductor (HTS) tape, the channel including at least one pre-formed curved section. The assembly further includes a plurality of layers of HTS tape fixed within the channel. Wherein the pre-formed curved section has a radius of curvature which is less than a total thickness of the layers of HTS tape in that section divided by twice a maximum permitted strain of the HTS tape.

The invention relates to an electrically and thermally conductive element (100) comprising:—a wire or ribbon (1) of high-purity aluminium;—a strip (2) of pyrolytic graphite or of graphene extending along the aluminium ribbon (1), said wire or ribbon (1) and the strip (2) being encapsulated together in a sheath (3) of an electrically insulating material.

Described is a cable comprising a plurality of high temperature superconductor (HTS) components, a plurality of electrically conductive segments extending along a length of the cable, each of the plurality of electrically conductive segments comprising one of the plurality of HTS components, and an electrically insulating material arranged between adjacent ones of the plurality of electrically conductive segments.

A round superconductor wire, method for fabricating same, and method for detecting quench in same are disclosed. Embodiments are directed to a round superconductor wire including a superconductor wire former and at least one superconductor tape wound on the superconductor wire former. Each superconductor tape includes: a substrate; a buffer film stack overlying the substrate; and a superconductor film overlying the buffer film stack. These and other embodiments achieve a round superconductor wire having improved engineering current density in high magnetic field applications when made in small diameters.

In various embodiments, superconducting wires incorporate diffusion barriers composed of Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.

The present invention relates to a superconducting pellet for a superconducting electrical machine, the superconducting pellet having a circumferential wall, the circumferential wall having: a first border, a second border opposite the first border, an inner face connecting the first border to the second border, an outer face opposite the inner face, and a cavity formed between the first border and the second border and defined by the inner face, and an additional wall which covers the first border or is flush with the first border so as to at least partially cover the cavity, or extends from the inner face at a distance from the first border and the second border so as to divide the cavity into two portions.