| 摘要 |
A cooling apparatus ( 10 ) for cooling a detector ( 52 ), the cooling apparatus including an inner and an outer countercurrent heat exchanger ( 12 and 14 , respectively) for a first and a second gas in a thermally insulating housing ( 16 ), the inner countercurrent heat exchanger ( 12 ) being arranged within a sublength of the outer countercurrent heat exchanger ( 14 ), and the inner countercurrent heat exchanger ( 12 ) being spatially separated from the outer countercurrent heat exchanger ( 14 ) by an outer sleeve ( 18 ). In this apparatus, the outer sleeve ( 18 ) has a partition plate ( 32 ) between an expansion nozzle ( 28 ) for the first gas located at the end of the inner countercurrent heat exchanger ( 12 ) and the remaining part of the outer countercurrent heat exchanger ( 14 ).
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