Patent ID: 7683624

Claim:
A magnetic field adjustment device for a superconducting magnet having a substantially cylindrical share, the magnetic field adjustment device comprising: magnetic material shim mechanisms arranged in an axial direction of an inside periphery of the superconducting magnet; wherein each of the magnetic material shim mechanisms comprises: a combined shim tray including a plurality of divided shim trays divided in the axial direction, and at least one shim tray spacer inserted between the divided shim trays such that the plurality of divided shim trays and the at least one shim tray spacer are rectilinearly coupled in the axial direction, the plurality of divided shim trays including a first type of shim trays having a first connection mechanism, and a second type of shim trays having a second connection mechanism different from the first connection mechanism of said first type of shim trays; and magnetic material shims accommodated in the divided shim trays for adjustment of a magnetic field.