| 摘要 |
PURPOSE:To make it possible to control the induced current in one superconducting coil due to transition of the other superconducting coil to a normal conduction state by a method wherein the superconducting bias coils, with which a ceramic superconducting body and the environmental magnetic field of said ceramic superconducting body are changed, are inserted in series into a permanent current circuit. CONSTITUTION:The title superconducting magnet device is composed of superconducting coils 1a and 2a, superconducting leads 1b and 2b, ceramic superconducting bodies 1c and 2c which are brought into a superconducting state at the temperature of liquid nitrogen or higher, the superconducting bias coils 1d and 2d which are used to change the environmental magnetic field of the ceramic superconducting bodies 1c and 2c, and the superconducting leads 1e and 2e manufactured by the ceramic superconducting material which is brought into a superconducting state at the temperature of liquid nitrogen. For example, when a trouble of normal conductive dislocation is generated, the current flowing to the superconducting bias coil 2d increases, and when the environmental magnetic field of the ceramic superocnducting body 2c is increased, the critical current value of the ceramic superconducting body 2c is reduced sharply and its tradition to normal conduction is performed quickly, and the increase in current by induction on a permanent current circuit 20 by the generation of resistance can be suppressed. |
