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Compact superconducting magnet configuration with active shielding, wherein the shielding coil damps the field maximum of the main coil as well as associated magnetic resonance tomograph, NMR spectrometer and ion cyclotron resonance mass spectrometer
Compact superconducting magnet configuration with active shielding, wherein the shielding coil damps the field maximum of the main coil as well as associated magnetic resonance tomograph, NMR spectrometer and ion cyclotron resonance mass spectrometer
An actively shielded superconducting magnet configuration (M1; M2; M3; 14) for generating a homogeneous magnetic field B0 in a volume under investigation (4b) has a radially inner superconducting main field coil (1) which is disposed rotationally symmetrically about an axis (z axis) and a coaxial radially outer superconducting shielding coil (2) which is operated in an opposite direction. The magnet configuration consists of the main field coil, the shielding coil and a ferromagnetic field-shaping device (3; 18), wherein the ferromagnetic field-shaping device is disposed radially inside the main field coil. The main field coil consists of an unstructured solenoid coil or of several radially nested unstructured solenoid coils (15, 16) which are operated in the same direction. An extension Labs of the shielding coil in the axial direction is smaller than the extension Lhaupt of the main field coil in the axial direction.; ]]> ;applies for the axial magnetic field profile BH+A(z) generated by the main field coil and the shielding coil during operation along the z-axis in the center at z=0 and; ]]> ;applies for the axial magnetic field profile BF(z) generated by the ferromagnetic field-shaping device (3; 18) during operation along the z-axis in the center at z=0, wherein the z-axis is oriented in a positive direction of the B0-field. An actively shielded superconducting magnet configuration of considerably simplified structure is thereby provided with a homogeneous and particularly high magnetic field B0 in the volume under investigation.
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机译:用于产生均匀磁场B 0的有源屏蔽超导磁体配置(M 1 B>; M 2 B>; M 3; 14 B>) Sub>在研究的体积( 4 B> b I>)中有一个径向内部的超导主磁场线圈( 1 B>),该线圈旋转对称地布置绕着一个轴(z轴)和一个沿相反方向工作的同轴径向外部超导屏蔽线圈( 2 B>)。磁体结构由主磁场线圈,屏蔽线圈和铁磁场整形设备( 3; 18 B>)组成,其中铁磁场整形设备在径向上位于主磁场线圈内部。主磁场线圈由非结构化螺线管线圈或沿相同方向操作的多个径向嵌套的非结构化螺线管线圈( 15、16 B>)组成。屏蔽线圈在轴向上的延伸长度L abs Sub>小于主磁场线圈在轴向上的延伸长度L haupt Sub>。 展开▼