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An overview of the latest developments on the closed-cycle dilution refrigerator for space applications.
Number: 0019
Author(s) : BESNARD A., SAUVAGE V., MAFFEI B.
Summary
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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Details
- Original title: An overview of the latest developments on the closed-cycle dilution refrigerator for space applications.
- Record ID : 30033876
- Languages: English
- Subject: Technology
- Source: Cryogenics 2025. Proceedings of the 18th IIR International Conference on Cryogenics, Prague, Czech Republic, 7-11 April 2025.
- Publication date: 2025/04/07
- DOI: http://dx.doi.org/10.18462/iir.cryo.2025.0019
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