| 摘要 |
PURPOSE:To further ensure a protecting function by a construction wherein a semiconductor protection circuit cooled down to a cryogenic temperature is connected in parallel to unit superconducting coils which are connected in series. CONSTITUTION:A superconductive device has a construction in which a superconducting magnet 1 and a permanent current switch 2 forming a closed loop are held in a cryogenic vessel and supplied with a power 4 through leads 3a and 4a. When a coil 5a is quenched, for instance, out of unit superconducting coils 5a and 5b coming into the state of superconduction, the resistance of the coil 5a increases sharply. At this time, a diode 11a is put in the ON state and consumes an energy released from the magnet 1. |
