PROBLEM TO BE SOLVED: To provide a superconducting magnet device that can increase degrees of spacial freedom in an arrangement of a magnetic piece included by a magnetic field correction mechanism without narrowing a measurement space formed in an internal region of the superconducting magnet.SOLUTION: The magnetic field correction mechanism 10 includes: a cylindrical frame 11 disposed nearer to the diameter than an circumferential wall 3a of a housing 3 a plurality of depressed parts 14 for forming a plurality of storage spaces 18 that are formed in an outer surface 12a of the frame 11 and surrounded by the circumferential wall 3a of the housing 3 and the magnetic piece 15 for correcting a magnetic field that is housed in the plurality of storage spaces 18.COPYRIGHT: (C)2012,JPO&INPIT【課題】超電導磁石の内部領域に形成される測定空間を狭めることなく、磁場補正機構が備える磁性体片の配置の空間的な自由度を高くするが可能な超電導磁石装置を提供すること。【解決手段】磁場補正機構10は、ハウジング3の内周壁3aよりも径内側に配された円筒状の枠体11と、枠体11の外周面12aに形成され、ハウジング3の内周壁3aとで囲繞された複数の収納空間18を形成する複数の凹部14と、複数の収納空間18に収納される磁場補正用の磁性体片15とを備えている。【選択図】図1
