Document IIF

Aperçu des récents développements concernant le réfrigérateur à dilution en cycle fermé pour les applications spatiales.

An overview of the latest developments on the closed-cycle dilution refrigerator for space applications.

Numéro : 0019

Auteurs : BESNARD A., SAUVAGE V., MAFFEI B.

Résumé

Future high-sensitivity space instruments require their focal planes to be cooled down to about 50 mK with a minimum cooling power of 2 μW, with a stable and continuous operation, without impacting the mission lifespan. The Open-Cycle Dilution Refrigerator (OCDR) operated on the Planck-HFI, produced a cooling power of 0.2 μW at 100 mK for 2.5 years. However, this system which operates through the circulation of 3He and 4He isotopes, has a limited operational lifespan due to the finite onboard supply of these isotopes. Since the OCDR does not meet the new requirements of future missions, it has evolved into the Closed-Cycle Dilution Refrigerator (CCDR), able to recycle both the 3He and 4He. Although this technology is currently operational on Earth (TRL 4), it has not been space-qualified (TRL 5) yet. This paper presents a comprehensive review of each subsystem, with particular emphasis on recent advancements and critical points of the CCDR development.

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Format PDF

Pages : 6 p.

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Détails

  • Titre original : An overview of the latest developments on the closed-cycle dilution refrigerator for space applications.
  • Identifiant de la fiche : 30033876
  • Langues : Anglais
  • Sujet : Technologie
  • Source : Cryogenics 2025. Proceedings of the 18th IIR International Conference on Cryogenics, Prague, Czech Republic, 7-11 April 2025.
  • Date d'édition : 07/04/2025
  • DOI : http://dx.doi.org/10.18462/iir.cryo.2025.0019

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