| 摘要 |
PURPOSE:To easily, freely, and finely adjust the position of a SQUID sensor by making a Dewar device which houses the sensor and its cooling medium in a heat-insulating state three-dimensionally rotatable around the center of curvature of a spherical convex or concave section. CONSTITUTION:A Dewar device 2A is equipped with an inner tank 11A for housing a SQUID sensor 21A which has a SQUID element composed of such a superconducting material, that indicates a superconducting state at the temperature 4K of liquid helium and liquid helium L, heat insulating tank l3A surrounding the tank 11A, and outer tank 12A. The Dewar device 2A can be easily rotated around the rotating shaft 42 of the device 2A passing through the center P of curvature of the spherical convex section 33A of a section 3A to be supported or the centers of curvature of the spherical concave sections 31L and 3lR of supporting sections 4L and 4R. In addition, the center P11 of curvature and the rotating shaft 42 itself of the device 2A can be rotated around a vertical axis 41 by + or -alpha Or, the device 2A can perform these two operations simultaneously. |
