| 摘要 |
PURPOSE:To detect surely superconduction breakdown even in case of a large- sized superconductive coil by inserting one superconduction breakdown detecting superconductive stand, which is not subjected to stabilizing treatment, at least to one primary stranded wire. CONSTITUTION:A superconduction breakdown detecting superconductive strand 9 which is not subjected to stabilizing treatment is inserted into the stranded wire where 3 superconductive strands 8 subjected to stabilizing treatment with a metal such as copper or the like are stranded, and this stranded wire is convered together with bundled conductors 11, where primary stranded wires 10 are stranded, with a casing 12 for airtightness or reinforcing, and a very low- temperature cooling medium for cooling is filled up in gaps of bundled conductors 11, thus constituting a superconductor 2. A current approximating the transition current value is flowed to the superconductive strand 9. If superconduction breakdown is caused in a part of the primary stranded wires 10, the cooling medium around the superconductive strand 9 is gasified, and the superconductive strand 9 causes superconduction breakdown to generate a large voltage, and it is detected by a superconduction breakdown detector 3. |
