Abstract In future space missions, it is likely there will be an increasing need for ultra low temperatures. For instance, XEUS is expected to employ a series of superconducting tunnel junctions and transition edge sensors that will require cooling down to 100 mK and below. Only a few technologies are capable of producing such low temperatures: dilution refrigerators, adiabatic demagnetization refrigerators (ADRs), and pomeranchuk cells, to name the most known. Space missions call for demanding specifications as far as the refrigerator design is concerned. In particular, they need to be extremely reliable, which implies that there should be no moving parts, and they should be as light and electrically efficient as possible. These requirements rule out most of the technologies except for the ADR and a promising new cooling technology: the SINIS junction. The main drawbacks of the ADR are its weight and electrical needs, which can both be quite high. To address these issues, CEA-SBT has chosen to take advantage of its sorption-cooler know-how to design a small ADR that is composed of a 1 Tesla superconducting coil (0.2T/A) coupled with a chromium-based salt refrigerant material; the ADR is then precooled by a 300 mK sorption cooler. This paper presents the design of the 100 mK refrigerator system and the first experimental results obtained.
Small Adiabatic Demagnetization Refrigerator for Space Missions
Cryocoolers 13 ; 561-566
2005-01-01
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Space Mission , Transition Edge Sensor , Dilution Refrigerator , Superconducting Tunnel Junction , Adiabatic Demagnetization Physics , Extraterrestrial Physics, Space Sciences , Strongly Correlated Systems, Superconductivity , Optics, Optoelectronics, Plasmonics and Optical Devices , Imaging / Radiology , Automotive Engineering
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