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Title: Superfluid stirling refrigerator: A new method for cooling below 1 Kelvin

Abstract

We have invented and built a new type of cryocooler, which we call the superfluid Stirling refrigerator (SSR). The first prototype reached 0.6 K from a starting temperature of 1.2 K. The working fluid of the SSR is the {sup 3}He solute in a superfluid {sup 3}He--{sup 4}He solution. At low temperatures, the superfluid {sup 4}He is in its quantum ground state, and therefore is thermodynamically inert, while the {sup 3}He solute has the thermodynamic properties of a dense ideal gas. Thus, in principle, any refrigeration cycle that can use an ideal gas can also use the {sup 3}He solute as working fluid. In our SSR prototype, bellows-sealed superleak pistons driven by a room-temperature camshaft work on the {sup 3}He solute. Ultimately, we anticipate elimination of moving parts by analogy with pulse-tube refrigeration. 15 refs., 6 figs.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
6517083
Report Number(s):
LA-UR-90-3380; CONF-901029-2
ON: DE91002311; TRN: 91-000306
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 6. international cryocooler conference, Plymouth, MA (USA), 25-26 Oct 1990
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; REFRIGERATORS; STIRLING CYCLE; DESIGN; HELIUM 3; HELIUM 4; HYDRODYNAMICS; SUPERFLUIDITY; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FLUID MECHANICS; HELIUM ISOTOPES; ISOTOPES; LIGHT NUCLEI; MECHANICS; NUCLEI; PHYSICAL PROPERTIES; STABLE ISOTOPES; THERMODYNAMIC CYCLES; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats

Kotsubo, V., and Swift, G.W. Superfluid stirling refrigerator: A new method for cooling below 1 Kelvin. United States: N. p., 1990. Web.
Kotsubo, V., & Swift, G.W. Superfluid stirling refrigerator: A new method for cooling below 1 Kelvin. United States.
Kotsubo, V., and Swift, G.W. Mon . "Superfluid stirling refrigerator: A new method for cooling below 1 Kelvin". United States. https://www.osti.gov/servlets/purl/6517083.
@article{osti_6517083,
title = {Superfluid stirling refrigerator: A new method for cooling below 1 Kelvin},
author = {Kotsubo, V. and Swift, G.W.},
abstractNote = {We have invented and built a new type of cryocooler, which we call the superfluid Stirling refrigerator (SSR). The first prototype reached 0.6 K from a starting temperature of 1.2 K. The working fluid of the SSR is the {sup 3}He solute in a superfluid {sup 3}He--{sup 4}He solution. At low temperatures, the superfluid {sup 4}He is in its quantum ground state, and therefore is thermodynamically inert, while the {sup 3}He solute has the thermodynamic properties of a dense ideal gas. Thus, in principle, any refrigeration cycle that can use an ideal gas can also use the {sup 3}He solute as working fluid. In our SSR prototype, bellows-sealed superleak pistons driven by a room-temperature camshaft work on the {sup 3}He solute. Ultimately, we anticipate elimination of moving parts by analogy with pulse-tube refrigeration. 15 refs., 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

Conference:
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