Abstract The influence of four cryocooler working fluids or purge fluids (He, Ar, N 2 , CO 2 ) on the outgassing rate of internal materials is studied. At gas exchange rates higher than 0.5 1/min it is found that the outgassing products, cryodeposit growth, and the transportation rate of outgassing products to heat exchangers depends only on the rate at which outgassing products diffuse to the surface of internal materials. Gases with a high affinity for adsorbing onto surfaces (N 2 , CO 2 ) slightly decrease the outgassing rate in the cryocooler by blocking the transport of products to/from material surfaces.
Cryocooler Working Medium Influence on Outgassing Rate
Cryocoolers 10 ; 733-741
2002-01-01
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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