Mitsubishi Electric Corporation

Canon Medical Systems Corporation

Taisaku Gomyo

Tomonori Tanaka

Tatsuya Inoue

Naoki Iwamoto

The superconducting electromagnet device includes a superconducting coil, a refrigerant container, a refrigerator, a heat exchanger, and a cooling cylinder. The refrigerant container accommodates refrigerant that cools the superconducting coil. The refrigerator includes a refrigeration stage. The heat exchanger is arranged inside the refrigerant container and connected to the refrigeration stage to cool refrigerant gas vaporized from the refrigerant. The cooling cylinder includes a bottom and a peripheral wall erected from an outer edge of the bottom, and is arranged inside the refrigerant container to surround the heat exchanger. The cooling cylinder is provided with an opening, through which the refrigerant gas flows, in the peripheral wall. The cooling cylinder stores liquid refrigerant recondensed by the heat exchanger on the bottom.

Superconducting electromagnet device

A superconducting magnet includes a superconducting coil, a coolant container, a radiation shield, a first pipe, a second pipe, a refrigerator, and a connection pipe. The refrigerator is fixed to seal a tip end of the second pipe, and is inserted in the second pipe to define a flow path of a coolant between the refrigerator and the second pipe. The connection pipe makes the interiors of the first pipe and the second pipe communicate with each other inside a vacuum container. The connection pipe includes a first connection portion connecting to the first pipe and a second connection portion connecting to the second pipe. The second connection portion is located between the vacuum container and the radiation shield.

Superconducting magnet

A superconducting magnet includes a superconducting coil, a coolant container, a radiation shield, a vacuum container, a first pipe, a refrigerator, a separator, a second pipe, a third pipe, a fourth pipe, and at least one pressure relief valve. The refrigerator is disposed such that a first flow path of vaporized coolant is defined by the refrigerator and the first pipe. The third pipe is connected to the first pipe outside the vacuum container, and extends in contact with the vacuum container. The fourth pipe is connected to the second pipe outside the vacuum container, and extends in contact with the vacuum container. The pressure relief valve is connected to the third pipe and the fourth pipe.

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Tokyo, Japan

Taisaku Gomyo