Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Naoji Yoshida

Hajime Tanabe

Shigenori Kuroda

Yasuyuki Tahara

Akihiro Harada

Kazuki Moritsu

Toshiki Idemaru

Tatuya Oue

Keiichi Ebihara

Kazuaki Takeuchi

A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.

Superconductive magnet device

A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.

A magnetic field producing apparatus is obtained which can easily perform a connection work, while securing a connection work space of a vortex coil, and can omit a base member. A width of a groove at an inner peripheral turned portion of a vortex coil is made wide to form a space without positionally shifting a center of the respective turned portions of the vortex coil. An inner peripheral end of the vortex coil can be easily picked up, a junction work with a connection lead can be readily performed, and also a bending work can be properly achieved.

Magnetic field producing apparatus and manufacturing method

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.

Superconductive magnet device with transparent pipes for accommodating

A passive shim arrangement for a nuclear magnetic resonance apparatus has a plurality of nonmagnetic tubes disposed at predetermined positions around a common axis. Each tube is parallel to and uniformly distant from the axis. Magnetic shims are inserted into the tubes to correct components of the magnetic field.

Growing community of inventors

Tokyo, Japan

Naoji Yoshida