PROBLEM TO BE SOLVED: To provide a superconducting magnet device that can avoid frequent occurrence of a quench phenomenon in a superconducting member of a bridge line during magnetization while reducing work man-hour.SOLUTION: A superconducting magnet device 100 includes: a plurality of superconducting coils 7, 8 which form prescribed magnetic field distribution in an observation region 4 and a bridge line 15 which short-circuits particular connection points P1, P2 on the plurality of superconducting coils 7, 8 to shield a magnetic field generated in the observation region 4 by a magnetic field generation source located outside of the superconducting magnet device 100. The bridge line 15 comprises a superconducting bridge line 18 and a matrix material 19 covering the superconducting bridge line 18. A low resistance material 22 having a smaller resistance value than the resistance value of the matrix material 19 is connected between the connection points P1, P2 in parallel in a view from an electric circuit, and arranged along the bridge line 15.COPYRIGHT: (C)2012,JPO&INPIT【課題】励磁中にブリッジ線の超伝導部材のクエンチが頻発することを、作業工数の低減を図りつつ回避することが可能な、超伝導磁石装置を提供する。【解決手段】超伝導磁石装置100は、観測領域4に所定の磁場分布を形成する複数の超伝導コイル7、8と、超伝導磁石装置100の外部にある磁場発生源によって観測領域4に生成される磁場を遮蔽するための、複数の超伝導コイル7、8上の特定の接続点P1、P2間を短絡させるブリッジ線15と、を有し、ブリッジ線15は、超伝導ブリッジ線18と、当該超伝導ブリッジ線18を覆うマトリックス材19とを備え、マトリックス材19の抵抗値よりも小さい抵抗値を持つ低抵抗材22が、接続点P1、P2間に電気回路的に並列に接続され、且つブリッジ線15に沿うように配置されている。【選択図】図3
