Patent ID: 7985925

Claim:
Superconducting hollow cable having the following features: an outer tube having a circular inner cross-section and a cylindrical inner wall; a central cooling channel having a polygonal or circular cross-section which is smaller than the inner cross-section of the outer tube and the central cooling channel being configured for a flow of a cooling medium; profiled superconducting wires which are arranged between the inner wall and the cooling channel and which comprise at least one superconducting filament and which have a cross-sectional profile of a key stone of a Roman stone bridges or a groin vaults, the cross-sectional profile of the profiled superconducting wires having an outer region of curvature which is matched to the polygonal or circular inner cross-section of the outer tube, and the cross-sectional profile of the profiled superconducting wires having side edges which are oriented towards the centre-point of the cooling channel; wherein the profiled superconducting wires are arranged on the inner wall of the outer tube; the cross-sectional profile of the profiled superconducting wires has an inner region of curvature which is matched to the circular cross-section of the cooling channel; the profiled superconducting wires form, by their inner regions of curvature, the cylindrical cooling channel of the superconducting hollow cable, said wires being arranged with their radially oriented side edges so tightly against one another and with their outer regions of curvature so tightly on the inner wall of the outer tube that they can hold themselves in position by a shape-based and force-based fit and maintain the cooling channel at operating temperatures of the superconducting hollow cable.