Superconducting magnet device

摘要

A superconducting magnet device includes a superconducting coil for generating a magnetostatic field, and a pulsating magentic field generating coil disposed on the inner diameter side of the superconducting coil. An inner cylinder of a thermal shielding tank located between the superconducting coil and the pulating magentic field generating coil is maintained at a temperature equal to or lower than the liquid nitrogen temperature. The inner cylinder is made of a superconductor which becomes superconductive at a temperature equal to or higher than the liquid nitrogen temperature. Further, a heating wire for heating the inner cylinder which is in a superconductive state to cause it to become normal conductive is provided on the inner cylinder of the thermal shielding tank in a direction in which it cuts across an induced current loop generated by the excitation of the static magnetic field.