| 摘要 |
PURPOSE:To reduce AC loss by winding a metal tape or a fine line with pictures around the external circumference of a superconducting wire and bundling and twisting a large number of wound wires to constitute a cable and putting this cable in a tube of stainless steel, etc., and then, heat-treating the tube to form an intermetallic compound superconductor. CONSTITUTION:A fine line 2 or a tape 21 is wound with appropriate pitches lp around the external circumference of a superconducting wire 1 made up of a material constituting Nb3Sn. The superconducting wires around which a fine line or a tape is wound are bundled in an appropriate number and twisted together. The cable is put in a tube made of stainless steel, etc., and then, molded in a prescribed dimension, and then, made into a cable-in-conduit type superconducting conductor through heat-treatment for formation of Nb3Sn, etc. The section between wires is electrically connected through the fine line or the tape by winding it with appropriate pitches around the external circumference of the superconducting wire as above. Thereby, the resistance between the wires increases with the result that AC loss due to a fluctuating magnetic field can be reduced, too. |
