Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction
Patent
1995-03-24
1996-08-06
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Liquefaction
62 511, F25B 1900
Patent
active
055422560
ABSTRACT:
A sample holding device (30) for a dilution refrigerator having a still (16), a mixing chamber (22), and a heat exchanger (26) connected between the still and mixing chamber whereby coolant flows from the still to the mixing chamber and from the mixing chamber to the still through respective first and second adjacent paths in the heat exchanger and wherein the mixing chamber has a tubular portion (27), the sample holding device comprising a tube for insertion in the tubular portion of the mixing chamber and having means (34) for holding a sample within the tubular portion, the tube having an aperture (36) adjacent the sample holding means communicating in use between the interior of the tube and the interior of the tubular portion and another aperture (37) positioned in use to communicate between the interior of the tube and the second path in the heat exchanger.
REFERENCES:
patent: 4484458 (1984-11-01), Longsworth
patent: 4631928 (1986-12-01), Walker
patent: 5003783 (1991-04-01), Reale
patent: 5189880 (1993-03-01), Frossati et al.
A Combined .sup.3 He--.sup.4 He Dilution Refrigerator, V. N. Pavlov, B. S. Neganov, J. Konicek and J. Ota, Cryogenics, Feb. 1978, all pages.
Simple Dilution Refrigerator, The Review of Scientific Instruments, vol. 43, No. 2, James L. Levine, Feb. 1972, all pages.
Novel Top-Loading 20 mK/15 T Cryomagnetic System, P. H. P. Reinders, M. Springford, P. Holton, N. Kerley and N. Killoran, Cryogenics 1987, vol. 27, Oxford, UK, all pages.
Batey Graham J.
Whitehurst Eric P.
Capossela Ronald C.
Oxford Instruments (UK) Limited
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