A connection structure of high-temperature superconducting wires includes first and second superconducting wires which are high-temperature superconducting wires respectively having a base material consisting of metal or alloy, and an oxide superconducting layer formed on the base material. A joint portion containing a superconducting connection portion between the first and second superconducting wires joins the first and second superconducting wires in a positional relationship facing the surfaces of first and second superconducting layers which are the oxide superconducting layers of each of the first and second superconducting wires, are opposed to each other. In a base material of at least one superconducting wire among the first and second superconducting wires, a first portion constituting the joint portion is thicker than a second portion not constitute the joint portion in the same base material.

A superconducting wired electrical circuit has two portions (1a, 1b) each having a superconducting cable core (2a, 2b), an electrical insulation layer (3a, 3b), a screen (4a, 4b) and a cryogenic jacket (5a, 5b) surrounding the screen (4a, 4b) to allow the circulation of a cryogenic fluid. At least a first arrangement (A) has a cryostatic junction unit (7) electrically connecting, in series, the two portions (1a, 1b), an inlet/outlet duct (14) for cryogenic fluid. A distinct tap-off module (12) has at least one inlet/outlet tapping (15) for the flow of a cryogenic fluid in the second portion (1b). A device (13) for blocking the passage of cryogenic fluid is interposed between the duct (14) and the tapping (15) and positioned around and in contact with the screen (4b) of the second portion (1b).

A superconducting wired electrical circuit has two portions (1a, 1b) each having a superconducting cable core (2a, 2b), an electrical insulation layer (3a, 3b), a screen (4a, 4b) and a cryogenic jacket (5a, 5b) surrounding the screen (4a, 4b) to allow the circulation of a cryogenic fluid. At least a first arrangement (A) has a cryostatic junction unit (7) electrically connecting, in series, the two portions (1a, 1b), an inlet/outlet duct (14) for cryogenic fluid. A distinct tap-off module (12) has at least one inlet/outlet tapping (15) for the flow of a cryogenic fluid in the second portion (1b). A device (13) for blocking the passage of cryogenic fluid is interposed between the duct (14) and the tapping (15) and positioned around and in contact with the screen (4b) of the second portion (1b).

An architecture for, and techniques for fabricating, a thermal decoupling device are provided. In some embodiments, thermal decoupling device can be included in a thermally decoupled cryogenic microwave filter. In some embodiments, the thermal decoupling device can comprise a dielectric material and a conductive line. The dielectric material can comprise a first channel that is separated from a second channel by a wall of the dielectric material. The conductive line can comprise a first segment and a second segment that are separated by the wall. The wall can facilitate propagation of a microwave signal between the first segment and the second segment and can reduce heat flow between the first segment and the second segment of the conductive line.

An architecture for, and techniques for fabricating, a thermal decoupling device are provided. In some embodiments, thermal decoupling device can be included in a thermally decoupled cryogenic microwave filter. In some embodiments, the thermal decoupling device can comprise a dielectric material and a conductive line. The dielectric material can comprise a first channel that is separated from a second channel by a wall of the dielectric material. The conductive line can comprise a first segment and a second segment that are separated by the wall. The wall can facilitate propagation of a microwave signal between the first segment and the second segment and can reduce heat flow between the first segment and the second segment of the conductive line.

A superconducting device includes a superconducting cable having a plurality of superconducting tapes in a plurality of phases, including a first phase, and at least one further phase. One or more superconducting tapes of the first phase is in electrical contact with one or more superconducting tapes of the at least one further phase through at least one resistive barrier that prevents current from passing between the first phase and the at least one further phase in the absence of a voltage between one or more of the superconducting tapes of the first phase or the at least one further phase. The first phase is electrically connected in series to at least one further phase.

A superconducting device includes a superconducting cable having a plurality of superconducting tapes in a plurality of phases, including a first phase, and at least one further phase. One or more superconducting tapes of the first phase is in electrical contact with one or more superconducting tapes of the at least one further phase through at least one resistive barrier that prevents current from passing between the first phase and the at least one further phase in the absence of a voltage between one or more of the superconducting tapes of the first phase or the at least one further phase. The first phase is electrically connected in series to at least one further phase.

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.

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.

The invention relates to electrical engineering, in particular, to the manufacturing technology of flexible high-temperature superconductors (HTS) with high critical current density in external magnetic field and to the method of manufacturing of said superconductors (tapes). The invention is applicable to industrial manufacturing of HTS wires with very high values of critical current density in magnetic fields over 1 Tesla at temperatures below 50 Kelvin, in particular, to industrial manufacturing of HTS wires intended for application in compact fusion reactors. Flexible high temperature superconductor is comprised of a substrate and a superconductor layer with RE.sub.1+2xBa.sub.2Cu.sub.3O.sub.7+3x overall composition comprised of a superconductor matrix of REBa.sub.2Cu.sub.3O.sub.7 composition and non-superconducting nanoparticles of RE.sub.2O.sub.3 composition, where x=0.05-0.15, RE is a rare earth element from the Y, Dy, Ho, Er, Tm, Yb and Lu group, whereas the concentration density of the said nanoparticles is at least 10.sup.16 nanoparticles/cm.sup.3. Method of manufacturing of the superconductor is comprised of pulsed laser deposition of superconductor material with RE.sub.1+2xBa.sub.2Cu.sub.3O.sub.7+3x overall composition, where x=0.05-0.15, RE is rare earth element from the Y, Dy, Ho, Er, Tm, Yb and Lu group, onto a substrate moving through the deposition zone and heated to a temperature of at least 800° C., whereas the deposition is performed using an ablated target made from multiphase sintered ceramics comprised of chemical elements that compose the superconductor material, at a deposition rate greater than 100 nm/s and at a temperature gradient in the deposition zone that ensures the deposition of the superconductor material without the formation of liquid phase. The invention allows for improvement of the properties of flexible high temperature superconductor by increasing its critical current in high magnetic fields and ensures simple and economic large scale production of said HTS conductor with improved properties.