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Cryostat description

A standard Oxford Instruments cryostat is used inverted with an upward viewing window. A full length insert tube is added to allow inverted operation. This seals in the neck with a PTFE sleeve. It is important that a full length tube is used - otherwise very little liquid nitrogen can be transferred into the cryostat during the filling process. The maximum liquid nitrogen capacity is 1.4 litres.

• Thermal properties
• A Description of the liquid nitrogen filling process
• Topping up
• Routine operation
• Using the 75 litre dewar
• Further notes