Cryopumping apparatus
First Claim
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1. In a cryopumping apparatus of the type including an elongated source of refrigeration adapted for mounting to a vacuum chamber and capable of producing a warm refrigeration stage of from 40 to 120K and a cold refrigeration stage of from 10 to 30K, the improvement comprising:
- a generally open top pan-shaped housing adopted for mounting said refrigeration source to said vacuum chamber whereby said open top of said pan can mate to and close a complementing opening in said vacuum chamber;
a first or warm panel thermally connected to said warm refrigeration stage and adapted to shield said refrigeration source from ambient radiant heat;
a second or cold panel thermally connected to said cold stage of refrigeration; and
a chevron baffle or louver closing a substantial portion of the open top of said housing and in thermal contact with said warm refrigeration stage.
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Abstract
A cryopump consisting of cryopanels attached to an elongated source of refrigeration in which heat is transferred from cryopumping surfaces to various stages of refrigeration by conduction including a chevron baffle or louver mounted parallel to the long axis of the refrigerator source and directly to the warmest stage of refrigeration.
24 Citations
10 Claims
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1. In a cryopumping apparatus of the type including an elongated source of refrigeration adapted for mounting to a vacuum chamber and capable of producing a warm refrigeration stage of from 40 to 120K and a cold refrigeration stage of from 10 to 30K, the improvement comprising:
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a generally open top pan-shaped housing adopted for mounting said refrigeration source to said vacuum chamber whereby said open top of said pan can mate to and close a complementing opening in said vacuum chamber; a first or warm panel thermally connected to said warm refrigeration stage and adapted to shield said refrigeration source from ambient radiant heat; a second or cold panel thermally connected to said cold stage of refrigeration; and a chevron baffle or louver closing a substantial portion of the open top of said housing and in thermal contact with said warm refrigeration stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification