| 摘要 |
PURPOSE: To provide a superconducting switch for a conduction cooling type superconducting magnet which is stable for a long time in a magnetic field. CONSTITUTION: Two niobium-tin tapes 13 stacked with a stainless steel foil are wound on a winding frame in order to give structural stiffness to a superconducting switch 11 for a superconducting magnet. The superconducting switch is impregnated with an epoxy resin under reduced pressure, and cooled with copper bus bars 37, 39, 71, 73 thermally connected to a cryogenic cooling unit used for conduction-cooling the superconducting magnet. The bus bars are also used to apply voltage to both ends of lead wires 41, 43 of the switch connected in series to excite the superconducting magnet and that of a magnet winding wire 61. |
