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Jun Uzawa

Tetsuo Oka

Ryohei Yabuno

Yoshitaka Ito

Yousuke Yanagi

Masaaki Yoshikawa

Takashi Nakamura

Uichiro Mizutani

A controlling method for a nuclear magnetic resonance apparatus. The method includes: (A) cooling the high-temperature superconductor at a magnetization low temperature sufficiently lower than a superconductor transition temperature, and magnetizing the high-temperature superconductor with a magnetic field; (B) raising the temperature of the high-temperature superconductor at a magnetic flux setting temperature higher than the magnetization low temperature and lower than the superconductor transition temperature and setting a predetermined magnetic flux density; and (C) controlling the high-temperature superconductor in an operation temperature range lower than the magnetic flux setting temperature. Therefore, a strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a magnetic flux density of the static magnetic field is held constant.

Controlling method of superconductor magnetic field application apparatus, and nuclear magnetic resonance apparatus and superconducting magnet apparatus using the method

A nuclear magnetic resonance apparatus including: a cup-shaped high-temperature superconductor having a hollow cylindrical shape or portion cooled to not more than a superconducting transition temperature in a vacuum insulating container and a detection coil for detecting an NMR signal of a material to be measured inserted into the hollow cylindrical portion of the high-temperature superconductor. The high-temperature superconductor is magnetized in an axial direction, a static magnetic field is thereby generated in the hollow cylindrical portion in a cylinder axial direction, and the NMR signal of a material is detected by the detection coil and the existing spectrometer. A strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a strength distribution of the static magnetic field is homogeneous.

Nuclear magnetic resonance apparatus

A magnet for producing a static magnetic field is improved, and a small-sized, high-resolution nuclear magnetic resonance system is provided. A superconductive bulk (,) of a high-temperature superconductor is cooled in a vacuum insulated container (,), and magnetized with a magnetizing coil (,). This is used for analyzing a subject (,).

Nuclear magnetic resonance spectrometer

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Wako, Japan

Jun Uzawa