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Caractéristiques du refroidissement transitoire d'une cryochambre pour un détecteur infra-rouge.

Transient cooling characteristics of cryochamber for an infrared detector.

Auteurs : LEE J. H., KIM H. Y., KANG B. H.

Résumé

The work investigates the transient cooling characteristics of an infrared detector cryochamber, which has a critical effect on the cooling load. The thermal modelling presented considers the conduction heat transfer through a cold well, the gases conduction due to outgassing, and radiation heat transfer. The transient cooling performance, such as the penetration depth and cooling load, is determined employing a finite difference method. It is found that the penetration depth increases as the bore conductivity increases. Gaseous conduction and radiation hardly affect the penetration depth. The transient cooling load increases as the bore conductivity increases. The effects of gaseous conduction and radiation on transient heat transfer are small in the initial stages of cooling. However, the effects of gaseous conduction and radiation become significant as the cooling proceeds.

Détails

  • Titre original : Transient cooling characteristics of cryochamber for an infrared detector.
  • Identifiant de la fiche : 2006-2164
  • Langues : Anglais
  • Source : Cryogenics and refrigeration. Proceedings of ICCR 2003.
  • Date d'édition : 22/04/2003

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