| 摘要 |
PURPOSE:To reduce the temperature gradient, to secure the limit heat flow bundle and to increase the stability of a superconductive coil by disposing an agitator in a superflow helium container, and producing a superflow helium flow in a cooling passage. CONSTITUTION:Liquid helium 2 in a container 3 is cooled by a heat exchanger 10, in a so-called pressurized superflow state. A superconductive coil 8 is formed by laminating many flatspiral coils 1 wound in a so-called pancake winding, spacers are radially arranged between the coils 1, and a cooling passage 4 is formed. The coil 1 is secured by a cylinder 11 and a flange 12, and a flowing hole matched to the passage 4 is formed in the cylinder 11. Accordingly, when an agitator 9 is operated, a vortex flow occurs in the helium 2 in the container 3, and the flow 7 of the helium 2 is produced in the passage 4 due to the retraction to the vortex flow. In this manner, a superconductive device for generating a high magnetic field having excellent stability can be obtained. |
