Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction
Patent
1997-04-29
1998-11-03
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Liquefaction
F25J 100
Patent
active
058292705
ABSTRACT:
A refrigerator for cooling a sample comprises a container for holding liquid helium refrigerant to cool the sample. First cooling means is provided for cooling a condensation region with liquid helium coolant whereby helium refrigerant condenses on the condensation region and collects in the container. A sorption pump pumps gaseous helium refrigerant from the container. Second cooling means is provided for cooling the sorption pump with the liquid helium coolant. The first and second cooling means are connected in series with a source of the liquid helium coolant.
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Capossela Ronald C.
Oxford Instruments (UK) Limited
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