Hybrid thermoelectric/Joule-Thomson cryostat for cooling detecto

Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction

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62 6, 62 32, 62 36, F25B 1902, F25B 2102

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active

055512445

ABSTRACT:
A hybrid thermoelectric/Joule-Thomson cryostat with a finite cryogenic gas supply is configured to greatly increase the cold operating time of a infrared detector array. A Joule-Thomson cryostat is located within a dewar vessel along with the infrared detector array to be cooled. Cryogenic gas from a cryogenic gas source is pre-cooled by a thermoelectric cooler at a location remote from the dewar vessel. Final cooling of the cryogenic gas is then performed by a demand flow Joule-Thomson cooler which has the ability to provide the low temperatures necessary for operation of an infrared detector. The operating period of the cryogenic gas supply and Joule-Thomson cryostat are increased by the cryogenic assistance of the thermoelectric cooler.

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