Cryostat assembly
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United States of America Patent
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N/A
Issued Date -
Jan 8, 2009
app pub date -
Sep 27, 2005
filing date -
Nov 9, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A cryostat assembly includes a thermal shield, a cooling system including a cold member maintained in use at a temperature lower than that of the thermal shield, a first adsorption pump assembly located at least partly within the thermal shield, a first switch thermally connecting the adsorption pump to the thermal shield, a second switch selectively, thermally connecting the adsorption pump to the cold member, and a first thermal link. The first adsorption pump includes a pumping chamber containing a working fluid and an adsorption pump in fluid communication with the pumping chamber. The first thermal link couples the pumping chamber to the cold member. During adsorption of the working fluid by the adsorption pump, a portion of the working fluid evaporates so as to cause the temperature within the pumping chamber to fall below the temperature of the cold member.
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