| 摘要 |
PURPOSE:To heighten the reliability in vacuum tightness of the titled device by a method wherein a radiating member, constituted by adhering it to a bus bar through the intermediary of an insulating member, is surrounded by a container and said radiating member is cooled to low temperature using a refrigerant, thereby enabling to eliminate the structural weak point of the inulating part of the device at a low temperature. CONSTITUTION:The refrigerant brought into a container 19 from a refrigerant feeding tube 6 cools a fin tube 18 and then it is exhausted to outside from a refrigerant collecting tube 11. Accordingly, the current applied to a superconductive electromagnetic device 3 is supplied through a bus bar 16, and the heat generated inside the bus bar 16 by the current and the heat penetrated to the terminal 4b, located at the end of the low temperature part, from a terminal 4a is transmitted to the fin tube 18 and cooled by the refrigerant. As the fin tube 18 is insulated from the bus bar 16 using an insulating pipe 17, insulating tubes 8 and 10 are unnecessary for the refrigerant feeding tube 6 and the refrigerant collecting tube 11, and also an insulating tube 15 is unncessary between the container 19 and the upper lid 2. As the insulating pipe 17 is hardened by impregnating epoxy resin into a glass tape, no caracks due to the difference in heat shrinkage rate are generated on the epoxy resin when the bus bar 16 and the fin tube 18 are cooled. |
