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US 12,467,662 B2Granted
Integrated dilution refrigerators
AssigneeMaybell Quantum Industries, Inc.
InventorsCorban I. Tillemann-Dick, Kyle J. Thompson, John Ogando Dos Santos Allan
Life of this patent
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Abstract
A dilution refrigerator is provided. The dilution refrigerator includes a plurality of thermal stages configured to be cooled to a plurality of temperatures. A coldest thermal stage of the plurality of thermal stages is disposed above warmer thermal stages of the plurality of thermal stages such that the coldest thermal stage is positioned furthest from a floor supporting the dilution refrigerator.
Claims20
A dilution refrigerator comprising:
- a plurality of thermal stages configured to be cooled to a plurality of temperatures, wherein:
- a coldest thermal stage of the plurality of thermal stages is disposed above warmer thermal stages of the plurality of thermal stages such that the coldest thermal stage is positioned furthest from a floor supporting the dilution refrigerator;
- and
- a still configured to provide cooling by distilling 3He vapor from a 3He—4He mixture, wherein:
- the still comprises a pumping port comprising a pipe entering the still through a surface of the still other than a surface of the still furthest from the floor,
- the pipe enters the still through a surface of the still closest to the floor, and
- the pipe is coupled to a trap, comprising:
- a p-trap;
- and
- a superleak configured to remove superfluid 4He from the p-trap.
7 more elements
A dilution refrigerator comprising:
- a plurality of thermal stages configured to be cooled to a plurality of temperatures, wherein:
- a coldest thermal stage of the plurality of thermal stages is disposed above warmer thermal stages of the plurality of thermal stages such that the coldest thermal stage is positioned furthest from a floor supporting the dilution refrigerator;
- a de-mixing chamber disposed above and thermally coupled to the coldest thermal stage;
- a mixing chamber disposed further from the floor than the de-mixing chamber;
- a fountain pump configured to transport 4He from the de-mixing chamber to the mixing chamber;
- a first impedance stage configured to cool a 3He/4He mixture;
- a heat exchange stage configured to cool the 3He/4He mixture prior to passing through the first impedance stage;
- and
- a still configured to distill 3He from the 3He/4He mixture received from the first impedance stage,
- wherein the heat exchange stage is configured to cool the 3He/4He mixture by returning cold 3He to the still from the mixing chamber.
7 more elements
Dependencies are inferred from the claim text.