So far, 3He-4He dilution refrigerators in terrestrial laboratories are the most effective way for obtaining steady low temperatures down to approximately 10 mK. Gravity plays a key role as a force that separates the heavier 3He-dilute (d) phase and the lighter 3He-concentrated (c) phase into two distinct bulks with a well-defined horizontal flat interface. An equivalent for gravity must be found if 3He-4He dilution refrigerators are planned for operating in space. We give a concrete technical design of 4He-circulating dilution refrigerator (4He-DR) for the use in a microgravity environment. This is done on the basis of a detailed consideration of the various features of 3He-4He liquid mixtures.
Electrically driven 4He-circulating dilution refrigerator for cooling aboard spacecraft
Cryogenics ; 41 , 9 ; 637-647
2001
11 Seiten, 13 Quellen
Article (Journal)
English
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