Magnetic field adjustment device and magnetic field adjustment method for superconducting magnet

A magnetic field adjustment device for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet;

• each of the magnetic material shim mechanisms, comprising a combined shim tray in which a plurality of sorts of divided shim trays of different axial lengths are rectilinearly coupled, and magnetic material shims for magnetic field adjustments as are accommodated in the divided shim trays.

A magnetic field adjustment device for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet;

• each of the magnetic material shim mechanisms, comprising a plurality of sorts of shim trays in which a plurality of shim pockets for accommodating magnetic material shims therein have different lengthwise positions, wherein the magnetic material shims for magnetic field adjustments are accommodated in the shim pockets.

A magnetic field adjustment device for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet;

• each of the magnetic material shim mechanisms, comprising a shim tray which includes a plurality of shim pockets for accommodating magnetic material shims therein, and a spacer within the shim tray, which is arranged within the shim pocket and which partitions an arrangement space of the magnetic material shims.

A magnetic field adjustment method for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet, comprising the steps of:

• preparing as the magnetic material shim mechanisms, combined shim trays each of which includes, at least, a plurality of divided shim trays divided in the axial direction and in each of which the divided shim trays are rectilinearly coupled;
• and
• simultaneously optimizing how to combine the divided shim trays in accordance with sorts of the combined shim trays to-be-used, and mounting quantities of magnetic material shims to be accommodated in the individual shim trays, thereby to determine arrangements of the magnetic material shims.

A magnetic field adjustment method for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet, comprising the steps of:

• preparing as the magnetic material shim mechanisms, a plurality of sorts of shim trays whose lengthwise positions of a plurality of shim pockets for accommodating magnetic material shims therein are different;
• and
• simultaneously optimizing the sorts of the shim trays and arrangements of the magnetic material shims, thereby to determine the arrangements of the magnetic material shims.

A magnetic field adjustment method for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet, comprising the steps of:

• preparing as each of the magnetic material shim mechanisms, a mechanism which includes a shim tray having a plurality of shim pockets for accommodating magnetic material shims therein, and a spacer within the shim tray, which is arranged within the shim pocket and which partitions an arrangement space of the magnetic material shims;
• and
• simultaneously optimizing the spacer within the shim tray and the magnetic material shims, thereby to determine arrangement of the magnetic material shims.