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Liquéfaction d'hélium-4 de faible capacité utilisant un refroidisseur 4 K comportant deux étages de tubes à pulsation.

Small scale helium-4 liquefaction using a two-stage 4 K pulse tube cooler.

Auteurs : THUMMES G., WANG C., HEIDEN C.

Type d'article : Article

Résumé

On the basis of previous results obtained with a two-stage pulse tube cooler that was able to provide a net cooling power of up to 0.37 watt at 4.2 K, a somewhat modified version has been built to use it for small scale helium-4 liquefaction. This paper presents first results obtained with this liquefier, which was operated with a Gifford-McMahon-rotary valve and a Gifford-McMahon-type compressor of 6 kilowatts input power. After the initial cool down period of about two hours for the second stage, a steady liquefaction rate of 0.13 liter/hour at 4.2 K was obtained.

Détails

  • Titre original : Small scale helium-4 liquefaction using a two-stage 4 K pulse tube cooler.
  • Identifiant de la fiche : 1999-2678
  • Langues : Anglais
  • Source : Cryogenics - vol. 38 - n. 3
  • Date d'édition : 03/1998

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