Refrigeration – Low pressure cold trap process and apparatus
Patent
1988-11-23
1989-10-17
Capossela, Ronald C.
Refrigeration
Low pressure cold trap process and apparatus
55269, 417901, B01D 800
Patent
active
048738336
ABSTRACT:
Apparatus comprising a bakeable high vacuum system using cryopumps is disclosed. Auxiliary cooling means in thermal contact with the primary pumping stage of the cryopump remove heat from the cryopump, whereby the walls of the cryopump may be heated during operation of the cryopump, such that the cryopump can be baked. This can result in substantially improved attainable pressure in the system.
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Pfeiffer Loren N.
West Kenneth W.
American Telephone & Telegraph Company AT&T Bell Laboratories
Capossela Ronald C.
Finston Martin I.
Pacher Eugen E.
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