| 摘要 |
PURPOSE:To compact the titled device, to lighten it and to stabilize the state of permanent currents by forming structure in which both terminals of a superconductive wire constituting a superconductive coil are short-circuited directly and housing the superconductive wire in a cryogenic vessel. CONSTITUTION:A superconductive coil 1 directly short-circuiting both terminals of a superconductive wire is housed in a cryogenic vessel 2 without leading out a current lead, etc. to the outside. The superconducting coil 1 is mounted in a magnetic field 4 generated by another coil 3 under the state containing an internal resistor (r) under a normal conductive state in order to exicte the device. The coil 3 is energized by a power supply 5, and generates the magnetic field 4. When the superconductive coil 1 is cooled at a superconductive transfer temperature or lower and the superconductive coil 1 is superconducted, the magnetic field received from the coil 3 is confined in th superconductive coil 1. When the superconductive coil 1 is separated from the inside of the magnetic field 4 generated from the coil 3 or the coil 3 is deenergized, the superconductive coil 1 generates a magnetic field 6 by permanent current as it is, thus completing the excitation of the superconducting coil 1. |
