Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Tatuya Oue

Naoji Yoshida

Toshiki Idemaru

Uji Shimada

A magnetic field correction device for producing a uniform field within a coil includes non-magnetic tubes attached on a cylinder at specific circumferential angles .psi. to accommodate the non-magnetic tubes therein. Each of the magnetic shims consists of two rod members of predetermined lengths and transverse sectional area ratio. The end angles and the sectional area ratio A.sub.2 /A.sub.1 of the two rods satisfy specific relationships.

Magnetic field correction device

A superconductive magnet device includes a superconductive magnet body and non-magnetic pipes made of a transparent non-magnetic material. Preferably, the magnetic shims for compensating for the inhomogeneous magnetic field components generated by the superconductive magnet body are colored in accordance with the kinds thereof. Thus, during the adjustment operation of the inhomogeneous magnetic field, the number, kinds, and the position of the magnetic shims within the non-magnetic pipes can be ascertained from without.

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Ako, Japan

Tatuya Oue