| 摘要 |
PURPOSE: To provide such a magnetic apparatus that the magnetic apparatus can be provided with a superconductive magnetic field stabilizing apparatus using a superconductive material at very low temperature (however, at higher temperature relatively). CONSTITUTION: For example, this magnetic apparatus which is appropriate to use in a magnetic resonance unit in which a magnetic field is generated by an electrically driven coil device held by a yoke 7 at a gap 3 between pole pieces 5 combined by the yoke 7, makes the variation in the magnetic field in the gap stable using a stabilization apparatus 43. In the stabilization apparatus 43, the yoke is divided into a multiplicity of parallel and separate finger-like parts 45, in some part of the whole length of the yoke, and the separate finger- like part is surrounded by another body of ring 47 made of a superconductive non-magnetic material. |
