| 摘要 |
PURPOSE:To reduce the amount of heat invaded to a superconductive device and then make the titled device compact with the large cooling action of the conduction part by a method wherein a plurality of electric good conductor disks having many small holes are laminated by providing gaps in the conduction part and then connected in series. CONSTITUTION:The current passage of the conduction part between current terminals 3 and 9 flows radially through the disks 6 between circular rings 7 and small diameter disks 8, and the disks 6 are cooled by helium gas 13 passing through the small holes 6a. The length of the current passage can be freely selected by the number of pieces of the product of those of the disks 6 and the circular rings 7, the small diameter disks 8, and the whole length of the conduction part is short. The conduction cross sectional area of the conduction part can be selected by the diameter and thickness of said disks 6, rings 7, and disks 8, thus enabling to obtain a conduction part of a high cooling efficiency. The thermal conductivity when gas passes through short holes is very large in the neighborhood of starting the approach run section of thermal conduction, and said section is formed in every disk 6, accordingly high thermal conductive characteristics can be obtained as a whole. |
