Helium-cooled cold surface, especially for a cryopump

Details Helium-cooled cold surface, especially for a cryopump Helium-cooled cold surface, especially for a cryopump

1981-02-27

1982-12-21

Capossela, Ronald C.

Refrigeration

Low pressure cold trap process and apparatus

55269, 62514R, 417901, B04D 800

Patent

active

043642357

ABSTRACT:
A cold surface, (e.g. for use in a so-called cryopump, i.e. a cryogenic vacuum vapor pump), is formed by a reservoir for liquid hydrogen surrounded by a double-wall vessel over an intervening evacuated insulating space. The lowest points of the compartment formed between the walls of the double-wall vessel and the interior of the liquid helium reservoir are connected by a conduit provided with a valve.

REFERENCES:
patent: 3252652 (1966-05-01), Trendelenbubg et al.

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