| 摘要 |
PROBLEM TO BE SOLVED: To suppress frictional heat generated by the friction against a spool when a superconductive wire is moved by electromagnetic force during current- carrying and prevent the generation of quenching by baking a baking film consisting of a material with a small friction coefficient on the inner side surface of flanges and on the outer peripheral surface of a barrel part where the spool will be in contact with a wound superconductive wire. SOLUTION: This superconductive coil is provided with a stainless steel spool 1 whose pipe-shaped barrel part 1a has flanges 1b at the both ends, and a winding part 3 consisting of copper stabilized NbTi superconductive wire 2 wound about the outer periphery of the barrel part 1a of this spool 1 between the flanges 1b. Further, the spool 1 has a baking film 4 of 500μm in thickness consisting of teflon baked on the inner side surface of both flanges 1b and on the outer peripheral surface of the barrel part 1a. Thus, the frictional force against the superconductive wire is made smaller than that in the case where the superconductive wire is directly in contact with the stainless steel, so that the generation of frictional heat can be suppressed and quenching can be prevented. |
