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Refroidissement en circuit fermé de détecteurs à infrarouge jusqu'à 250 mK.

Closed cycle cooling of infrared detectors to 250 mK.

Auteurs : BHATIA R. S., CHASE S. T., JONES W. C., et al.

Type d'article : Article

Résumé

The authors designed and built a cryogenic system which uses no expendable liquid cryogens and consists of a three-stage cryocooler together with a three-stage sorption cooler to achieve a base temperature of 239 mK. They achieved a temperature of 250 mK at the expected 0.5 µW loading. The duty cycle of the sorption cooler alone was 93%. The cryogenic system was designed for autonomous cycling and operation, and will be used to cool the detectors and optics on the Polatron instrument to observe the 2.7 K cosmic microwave background.

Détails

  • Titre original : Closed cycle cooling of infrared detectors to 250 mK.
  • Identifiant de la fiche : 2004-0011
  • Langues : Anglais
  • Source : Cryogenics - vol. 42 - n. 2
  • Date d'édition : 02/2002

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