Cryogenic pump

Abstract

[Topic] To improve the suction capacity of a cryogenic pump. [Solution] The cryogenic pump (10) includes a radiation shield (30) and multiple cryogenic plates: the radiation shield (30) is thermally coupled to the first cooling platform (22) of the refrigeration unit (14) and extends axially from the cryogenic pump suction port (12) into the cryogenic pump container (16) in such a way that a gap (31) is formed between the shield and the cryogenic pump container (16); the multiple cryogenic plates are thermally coupled to the second cooling platform (24) of the refrigeration unit (14) and are arranged axially in the inner space (36) of the radiation shield (30). The multiple cryogenic plates include a bottom cryogenic plate (43) configured among the multiple cryogenic plates to be closest to the bottom (16c) of the container in the axial direction. The radiation shield (30) has a lower part (30b) of the shield extending axially toward the bottom of the container (16c) beyond the bottom low temperature plate (43), and the lower part (30b) of the shield defines a bottom opening (34) of the shield that connects the outer gap (31) of the shield to the inner space (36).

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