Automatic low-temperature system for neutron four-circle diffractometer

M. Merisalo, M.H. Nielsen, K. Henriksen

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    Abstract

    An automatic low-temperature system for the neutron four-circle diffractometer is described. The crystal specimen is cooled with a stream of cold nitrogen gas obtained from boiling liquid nitrogen. Cold gas is then warmed to room temperature to facilitate the control of the gas flow without cryogenic components, and recooled by passing it through a heat exchanger immersed in the liquid nitrogen. Techniques for the automatic refilling of the cold gas generator and for preventing ice formation on the crystal are presented. Any desired temperature in the 100-300 K range can be achieved. Performance of the system is discussed.
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    PublisherRisø National Laboratory
    Number of pages18
    ISBN (Print)8755001807
    Publication statusPublished - 1973
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number279
    ISSN0106-2840

    Keywords

    • Risø-R-279
    • Risø-279
    • Risø report 279

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