Riken Corporation

National Institute for Materials Science

National Institute of Materials Science

Kenjiro Hashi

Tadashi Shimizu

Masato Takahashi

Hideaki Maeda

Kyoko Kawagishi

Shinji Matsumoto

Gen Nishijima

Takashi Noguchi

Hideo Itozaki

Tadayuki Kondo

A superconducting magnet device including a superconducting coil formed of a high-temperature superconducting wire, a power supply which supplies current to the superconducting coil, and a protector capable of forming a short-circuit path which short-circuits both ends of the superconducting coil to each other is installed. Current is made to flow from the power supply to the superconducting coil in a superconducting state, and the superconducting coil thereby generates a magnetic field. After the magnetic field is generated, when an abnormality of the superconducting magnet device is detected, or when the power supply and the superconducting coil are disconnected from each other, the short-circuit path is formed by the protector.

Superconducting magnet device and method for limiting current decrease in case of abnormality therein

A portable small mine detecting device for detecting a mine by transmitting a radio wave and detecting the NQR of nitrogen 14 atoms (14N) contained in the mine using a high-sensitivity, high-temperature superconducting SQUID magnetic sensor. The mine detecting device can be applied to non-metal mines and can detect different kinds of explosive substances simultaneously.

Mine detector with NQR-SQUID

Growing community of inventors

Ibaraki, Japan

Kenjiro Hashi