This superconducting wire includes: a strand including a superconducting material; and a stabilizer material for superconductor arranged in contact with the strand, wherein the stabilizer material for superconductor includes a copper material which contains one kind or two kinds or more of additive elements selected from Ca, Sr, Ba, and rare earth elements (RE) for a total amount of 3 ppm by mass or more and 400 ppm by mass or less, with the remainder being Cu and unavoidable impurities, the total concentration of the unavoidable impurities other than O, H, C, N, and S, which are gas components, is 5 ppm by mass or more and 100 ppm by mass or less, and compounds including one kind or two kinds or more selected from CaS, CaSO.sub.4, SrS, SrSO.sub.4, BaS, BaSO.sub.4, (RE)S, and (RE).sub.2SO.sub.2 are present in the matrix.

This superconducting wire includes: a strand including a superconducting material; and a stabilizer material for superconductor arranged in contact with the strand, wherein the stabilizer material for superconductor includes a copper material which contains one kind or two kinds or more of additive elements selected from Ca, Sr, Ba, and rare earth elements (RE) for a total amount of 3 ppm by mass or more and 400 ppm by mass or less, with the remainder being Cu and unavoidable impurities, the total concentration of the unavoidable impurities other than O, H, C, N, and S, which are gas components, is 5 ppm by mass or more and 100 ppm by mass or less, and compounds including one kind or two kinds or more selected from CaS, CaSO.sub.4, SrS, SrSO.sub.4, BaS, BaSO.sub.4, (RE)S, and (RE).sub.2SO.sub.2 are present in the matrix.

The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

In order to obtain a highly versatile superconducting cable capable of absorbing differences in thermal contraction amounts that arise between three members, these being a cable core, an inner tube, and an outer tube, and to obtain a superconducting cable manufacturing method of the same, a superconducting cable includes a thermal insulation vacuum tube and a cable core. The thermal insulation vacuum tube includes an inner tube fixed at both ends and having a cooling medium filled inside, and an outer tube disposed at an outer peripheral side of the inner tube with a space between the outer tube and the inner tube maintained at a vacuum, and is configured to include a winding section wound with one or more turns. The cable core is fixed at both ends and disposed inside the inner tube.

In order to obtain a highly versatile superconducting cable capable of absorbing differences in thermal contraction amounts that arise between three members, these being a cable core, an inner tube, and an outer tube, and to obtain a superconducting cable manufacturing method of the same, a superconducting cable includes a thermal insulation vacuum tube and a cable core. The thermal insulation vacuum tube includes an inner tube fixed at both ends and having a cooling medium filled inside, and an outer tube disposed at an outer peripheral side of the inner tube with a space between the outer tube and the inner tube maintained at a vacuum, and is configured to include a winding section wound with one or more turns. The cable core is fixed at both ends and disposed inside the inner tube.

A vector signal generator is capable of operating on microwave frequencies. It comprises a microwave resonator, an output for coupling microwave photons out of said microwave resonator, and a Josephson junction or junction array coupled to the microwave resonator for emitting microwave signals into the microwave resonator. A biasing circuit is provided for applying a bias to the Josephson junction or junction array. A tunable attenuator is coupled to said microwave resonator.

A vector signal generator is capable of operating on microwave frequencies. It comprises a microwave resonator, an output for coupling microwave photons out of said microwave resonator, and a Josephson junction or junction array coupled to the microwave resonator for emitting microwave signals into the microwave resonator. A biasing circuit is provided for applying a bias to the Josephson junction or junction array. A tunable attenuator is coupled to said microwave resonator.

An electrically connecting device (1) includes a linking part defining an internal channel (12) that opens onto the exterior of the linking part. The internal channel (12) is able to receive two end segments of two superconducting wires (2, 3) that lie parallel in the internal channel (12) over a segment of common length; and an aperture (13) in the external jacket of the linking part. The aperture (13) is in communication with the internal channel (12) in order to allow a brazing material in liquid form to be inserted into the internal channel (12) around the two end segments of the two superconducting wires (2, 3).

An electrically connecting device (1) includes a linking part defining an internal channel (12) that opens onto the exterior of the linking part. The internal channel (12) is able to receive two end segments of two superconducting wires (2, 3) that lie parallel in the internal channel (12) over a segment of common length; and an aperture (13) in the external jacket of the linking part. The aperture (13) is in communication with the internal channel (12) in order to allow a brazing material in liquid form to be inserted into the internal channel (12) around the two end segments of the two superconducting wires (2, 3).