| 摘要 |
PURPOSE:To avoid the damage of a superconductive coil by a method wherein a cooling equipment is composed of a cold box for generating cryogen, a liquid He storag and a cryogenic container in which a superconductive coil is stored and prescribed valves are provided between the storage and the container. CONSTITUTION:High purity He gas, compressed by a compressor 1, is introduced into a cold box 2 and a part of it is turned into liquid He by expansion turbines 4a and 4b. The produced liquid He is led into a He storage 10 through a conveyor tube 9a to be stored as liquid He 11. Then, a part of the liquid He 11 is led into a cryogenic container 18, in which a superconductive coil 19 is stored, through a conveyer tube 12 to cool the coil 19. In this configuration, a manual valve 13b is provided to the conveyer tube 12 and the storage 10 and the container 18 are connected by a connecting tube in which manual valves 14a and 14b for recycling are connected in parallel. With this constitution, when an abnormal voltage detector 22 operates, the valve 14b is opened and at the same time the valve 13b is closed. |
