Adiabatic expansion of 3He in 4He

A.T.A.M. de Waele

    Research output: Contribution to journalArticleAcademicpeer-review

    1 Citation (Scopus)


    In 1951 H. London proposed the adiabatic expansion of 3He in 4He to obtain cooling in the millikelvin range. In this paper the feasibility of the technique is investigated to provide a cooling power of 1 μW at 50 mK. Injecting 4He in a fixed amount of 3He is, in principle, a single-cycle method but it can produce continuous cooling by using two such expanders working in opposite phase. It is independent of gravity, so it may be a candidate for cooling in space. In contrast to the Planck mission it is a closed system which uses fixed amounts of 3He and 4He.

    Original languageEnglish
    Pages (from-to)83-89
    Number of pages7
    Publication statusPublished - 1 Dec 2018


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