| 摘要 |
PURPOSE:To eliminate the defective cooling of a superconducting coil, and to obtain a stabilized superconducting magnet device on which the abnormal state such as superconducting breakdown is hardly generated by a method wherein a bubble guide is provided in a refrigerant for the purpose of separating a liquid helium and gas helium. CONSTITUTION:Bubble guides 6 are uprightly provided along the inner surface of a superconducting coil 2. Helium bubbles 7 go up passing through the bubble guides 6 provided as above, the side face of the superconducting coil 2 is brought into contact with liquid helium only, and the gas helium, having low cooling efficiency, is separated from the side face of the superconducting coil by the bubble guide. As a result, the poor cooling of the superconducting coil is prevented, an abnormal state such as superconducting breakdown hardly occurs, and a stable magnetic device can be obtained. |
