PROBLEM TO BE SOLVED: To provide an electromagnet device which allows a worker to do a magnetic field adjusting work without being affected by a high magnetic field even when the device is in an excitation state.SOLUTION: An electromagnet device 70 includes: a superconductive coil 23； a yoke side plate 22 surrounding the coil； and a yoke top board 21 and a yoke bottom plate 52 to which a magnetic pole structure 25 is removably attached. In the magnetic pole structure 25 attached to the opening part of the yoke top board 21, a plurality of magnetic field adjusting members 30, penetrating the magnetic pole structure 25 from the outside to protrude from the magnetic pole structure, are provided along the circumferential direction of the superconductive coil 23. The magnetic field adjusting members can be inserted from the outside.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】励磁状態であっても作業者が高磁場の影響を受けることなく磁場調整作業を行うことを可能にする電磁石装置を提供する。【解決手段】電磁石装置７０は、超伝導コイル２３と、それを取り囲むヨーク側板２２と、磁極構造体２５が着脱可能に取り付けられたヨーク天板２１およびヨーク底板５２と、を少なくとも備えて構成される。ここで、ヨーク天板２１の開口部に取り付けられた磁極構造体２５には、磁極構造体２５の外側から内側に貫通して突出し、外側からねじ込み可能な複数の磁場調整部材３０が、超伝導コイル２３の円周方向に沿って設けられている。【選択図】図１
