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Résultats des essais d'un cryogénérateur à adsorption 25 K pour l'expérience d'un ballon de l'UCSB sur le rayonnement cosmique.

Preliminary test results for a 25 K sorption cryocooler designed for the UCSB long duration balloon cosmic microwave background radiation experiment.

Auteurs : WADE L. A., LEVY A. R.

Résumé

A continuous operation vibration-free, long-life 25 K sorption cryocooler has been built and is now in final performance testing. This cooler will be flown on the University of California at Santa Barbara (UCSB) long duration balloon cosmic microwave background radiation experiment. The cooler uses hydrogen as the refrigerant and lanthanum-nickel(4.8)-tin(0.2) as the hydride sorbent. Several features, including a high pressure tank and low pressure sorbent bed, are incorporated to stabilize the cold temperature to better than 1 milliK/second. Small zirconium-nickel compressors are utilized to activate the compressor element gas-gap thermal switches whithout valves. Porous plugs are used as the Joule-Thomson flow restrictor to greatly enhance contamination tolerance. Passive check valves are used to direct the refrigerant flow.

Détails

  • Titre original : Preliminary test results for a 25 K sorption cryocooler designed for the UCSB long duration balloon cosmic microwave background radiation experiment.
  • Identifiant de la fiche : 1998-1516
  • Langues : Anglais
  • Source : Cryocoolers 9. Proceedings of the International Cryocooler Conference.
  • Date d'édition : 25/06/1996
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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