Cooling method and energizing method of superconductor

Details Cooling method and energizing method of superconductor Cooling method and energizing method of superconductor

H - Electricity

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L

H01L 39/00 (2006.01) F17C 13/00 (2006.01) F25B 25/00 (2006.01) F25D 16/00 (2006.01) H01B 12/16 (2006.01) H01F 6/04 (2006.01)

Patent

CA 2210540

A method is provided for cooling a high temperature superconductor such as an oxide superconductor to a lower temperature at a lower cost with a more simple system. A superconducting coil is attached to a cooling stage of a refrigerator. By immersing the superconducting coil on the cooling stage in liquid nitrogen, the superconducting coil is cooled rapidly. Then, the superconducting coil is further cooled by the refrigerator. By the cooling operation of the refrigerator, the liquid nitrogen is solidified. Thus, the superconducting coil is surrounded with solidifed nitrogen. The superconducting coil covered with the solidified nitrogen is further cooled by the refrigerator. In the superconducting coil cooled to a lower temperature and covered with solid nitrogen, quenching is suppressed to allow a higher current to be conducted.

Cette invention concerne une méthode de refroidissement d'un supraconducteur haute température, tel un oxyde supraconducteur, à une température inférieure à meilleur coût et au moyen d'un système simplifié. Une bobine supraconductrice est fixée au circuit froid d'un réfrigérateur. En immergeant la bobine dans de l'azote liquide, on obtient un refroidissement rapide qui est poussé plus loin par le réfrigérateur. L'apport de froid du réfrigérateur ayant pour effet de solidifier l'azote liquide, la bobine supraconductrice est noyée dans de l'azote solidifié qui est davantage refroidi par le réfrigérateur. Dans une bobine supraconductrice amenée à une température plus basse et noyée dans de l'azote solide, les effets d'extinction sont supprimés pour permettre la conduction d'un courant plus intense.

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