Patent ID: 6332324
Filing Date: 2001-12-25
Classification: F17C,F25B,F25D,G01R

Abstract:
A cryostat for containing objects to be cooled, said cryostat comprising:an inner container for containing said objects to be cooled and coolant to cool said objects; andcooling means for cooling said objects by cooling said coolant, which has been poured around said objects in said inner container from the outside of said inner container so a to soak said objects in said coolant before said inner container is closed, and the cooling of said coolant is started, to a predetermined temperature at which said coolant is in a solidified state;wherein a solidifying point of said coolant is less than the normal temperature, and one of coolant in a fluid state under the normal temperature and pressure, and coolant which is melted to be in a fluid state by being heated under the normal pressure in advance, is used as said coolant to be poured into said inner container.