A compact superconducting magnet arrangement with active shielding, wherein the shielding coil is used for field shaping

摘要

Actively shielded, superconducting magnet arrangement (4; 14) for generating a homogeneous magnetic field B0 in an examination volume (4b), - with a radially inner, superconducting main field coil (1) arranged rotationally symmetrically about a z-axis, - and with a coaxial, radial external superconducting shielding coil (2) operated in opposite directions, the magnet arrangement (4; 14) consisting of the main field coil (1), the shielding coil (2) and a ferromagnetic field-shaping device (3; 18), and wherein the ferromagnetic field-shaping device (3; 18) is arranged radially inside the main field coil (1), characterized in that the main field coil (1) consists of an unstructured solenoid coil or of several unstructured solenoid coils (15, 16) operated in the same direction and placed one inside the other radially, - that the extension Labs of the shielding coil (2) is smaller in the axial direction than the extension Lhaupt of the main field coil (1) in the axial direction - the axial magnetic field profile (5) generated by the main field coil (1) and the shielding coil (2) during operation along the z-axis in ...