Techniques facilitating electrical coupling within cryogenic environments are provided. In one example, an electrical coupling device for a cryogenic electronics system can comprise a flexible wiring strip that includes non-superconducting wiring and a thermal break that includes superconducting wiring. The superconducting wiring can be coupled with the flexible wiring strip to bridge a gap defined, in part, by the flexible wiring strip. The superconducting wiring comprises higher electrical conductivity and lower thermal conductivity than the non-superconducting wiring.

In a superconducting wire, a superconducting material joining layer joins a first end portion of a first superconducting material layer of a first wire and a second end portion of a second superconducting material layer of a second wire. The first wire and the second wire are disposed such that a first end face and a second end face are positioned to face in the same direction. The first wire further includes a first conductor layer disposed on the first main surface so as to be located adjacent to the first end portion. The second wire further includes a second conductor layer disposed on the second main surface so as to be located adjacent to the second end portion. The first conductor layer and the second conductor layer are connected to each other.

A superconducting electrical power distribution system has a superconducting bus bar and one or more bus bar thermal conductor lines extending in thermal proximity along the bus bar to receive heat from the bus bar over the length of the bus bar. The system further has superconducting cables electrically connected to the bus bar at respective electrical joints distributed along the bus bar. The system further has a cryogenic cooling sub-system. The system further has a network comprising first and second thermal conductor lines, each line comprising a cold end which is cooled by the cryogenic cooling sub-system, and an opposite hot end, whereby heat received by each line is normally conducted along the line in a direction from its hot end to its cold end.

A system for powering a datacenter campus including a main direct current (DC) superconductor cable configured to receive direct current DC electrical power from an alternating current (AC) power grid through a AC-DC converter, a DC-DC hub connected to the main superconductor cable, and a plurality of secondary DC superconductor cables, wherein each secondary DC superconductor cable includes a first end electrically connected to the DC-DC hub and a second end electrically connected to server racks housed in a respective datacenter building of the datacenter campus.

A system for powering a datacenter campus including a main direct current (DC) superconductor cable configured to receive direct current DC electrical power from an alternating current (AC) power grid through a AC-DC converter, a DC-DC hub connected to the main superconductor cable, and a plurality of secondary DC superconductor cables, wherein each secondary DC superconductor cable includes a first end electrically connected to the DC-DC hub and a second end electrically connected to server racks housed in a respective datacenter building of the datacenter campus.

In a high-temperature superconducting (HTS) wire connection assembly in which HTS wires each including a HTS layer are connected to each other, a first HTS wire and a second HTS wire that face each other are connected to each other at a plurality of joint portions separated from each other along a longitudinal direction of the first HTS wire and the second HTS wire. Each of the plurality of joint portions may preferably have any one of a rectangle shape, a rounded rectangle shape, and an ellipse shape, and it is preferable to satisfy 0.1<L/W<1.5, and is more preferable to satisfy 0.25<L/W<0.75 when a length in the longitudinal direction of the HTS wire is taken as L and a length in a width direction of the HTS wire is taken as W. It is also preferable that W and/or L monotonously increase from upstream side toward downstream side along the longitudinal direction of the wire.

In a high-temperature superconducting (HTS) wire connection assembly in which HTS wires each including a HTS layer are connected to each other, a first HTS wire and a second HTS wire that face each other are connected to each other at a plurality of joint portions separated from each other along a longitudinal direction of the first HTS wire and the second HTS wire. Each of the plurality of joint portions may preferably have any one of a rectangle shape, a rounded rectangle shape, and an ellipse shape, and it is preferable to satisfy 0.1<L/W<1.5, and is more preferable to satisfy 0.25<L/W<0.75 when a length in the longitudinal direction of the HTS wire is taken as L and a length in a width direction of the HTS wire is taken as W. It is also preferable that W and/or L monotonously increase from upstream side toward downstream side along the longitudinal direction of the wire.

In the connection portion for a superconducting wire, a plurality of superconducting wires are integrated by a sintered body containing MgB.sub.2, end portions of the superconducting wires each having an outer peripheral surface of a superconducting filament exposed are inserted into a container in parallel. The container has an opening having a diameter larger than a wire diameter of the superconducting wires on at least one side in a longitudinal direction of the superconducting wires, and the sintered body is in contact with the outer peripheral surfaces of the superconducting filaments. The method for connecting a superconducting wire includes: exposing the outer peripheral surfaces of the superconducting filaments; inserting the superconducting wires into the container; filling the container with a raw material; and heat-treating the raw material to generate the sintered body. The raw material is pressurized in parallel to the longitudinal direction of the superconducting wires and then heat-treated.

Provided is a connection body of high-temperature superconducting wire materials including a first oxide high-temperature superconducting wire material and a second oxide high-temperature superconducting wire material, characterized in that a first superconducting layer of the first oxide high-temperature superconducting wire material and a second superconducting layer of the second oxide high-temperature superconducting wire material are bonded together via a junction including M-Cu—O (wherein M is a single metal element or a plurality of metal elements included in the first superconducting layer or the second superconducting layer). The connection body may be, for example, a connection body of Bi2223 wire materials, and the junction may include CaCuO.sub.2.

Provided is a connection body of high-temperature superconducting wire materials including a first oxide high-temperature superconducting wire material and a second oxide high-temperature superconducting wire material, characterized in that a first superconducting layer of the first oxide high-temperature superconducting wire material and a second superconducting layer of the second oxide high-temperature superconducting wire material are bonded together via a junction including M-Cu—O (wherein M is a single metal element or a plurality of metal elements included in the first superconducting layer or the second superconducting layer). The connection body may be, for example, a connection body of Bi2223 wire materials, and the junction may include CaCuO.sub.2.