A new He-3 refrigerator for space applications

C. I. Jewell, G. Dalloglio, W. Fischer, L. Piccirillo, L. Pizzo

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Helium three (He-3) refrigerators capable of reaching 0.3 K in space with liquid helium cryogen cooling stages at approximately 1.8 K were already developed to the point of being tested on sounding rockets. A new design of He-3 refrigerator incorporating an additional closed cycle He-4 stage, which operates with the precooler at 4 K, is described and evaluated for its potential with respect to space applications. The use of such a He-3 refrigerator coupled to a 4 K cryocooler is discussed, with the suggested possibility of long life (several years) microwatt cooling at 0.3 K, for a spacecraft system level cost which is expected to be less than 50 kilograms and 200 Watts of power input.
    Original languageEnglish
    Title of host publicationhost publication
    Publication statusPublished - Dec 1991
    Event4th European Symposium on Space Environmental Control Systems Volume 1 p 403-405 (SEE N92-25828 16-18) -
    Duration: 1 Jan 1824 → …

    Conference

    Conference4th European Symposium on Space Environmental Control Systems Volume 1 p 403-405 (SEE N92-25828 16-18)
    Period1/01/24 → …

    Keywords

    • CLOSED CYCLES, COOLING SYSTEMS, CRYOGENIC COOLING, HELIUM ISOTOPES, REFRIGERATORS, CRYOGENICS, LIQUID HELIUM, SOUNDING ROCKETS

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