NDLI: A continuous adiabatic demagnetization refrigerator for use with mechanical coolers

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A continuous adiabatic demagnetization refrigerator for use with mechanical coolers

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shirron, P. Abbondante, N. Hirsch, M. Jackson, M. Tuttle, J. DiPirro, M. Grabowski, M. Canavan, E.
Copyright Year	2000
Description	We have begun developing an adiabatic demagnetization refrigerator (ADR) which can produce continuous cooling at temperatures of 50 mK or lower, with high cooling power (goal of 10 PW). The design uses multiple stages to cascade heat from a continuously-cooled stage up to a heat sink. The serial arrangement makes it possible to add stages to extend the operating range to lower temperature, or to raise the heat rejection temperature. Compared to conventional single-shot ADRS, this system achieves higher cooling power per unit mass and is able to reject its heat at a more uniform rate. For operation with a mechanical cryocooler, this latter feature stabilizes the heat sink temperature and allows both the ADR and cryocooler to operate more efficiently. The ADR is being designed to operate with a heat sink as warm as 10-12 K to make it compatible with a wide variety of mechanical coolers as part of a versatile, cryogen-free low temperature cooling system. A two-stage system has been constructed and a proof-of-principle demonstration was conducted at 100 mK. Details of the design and test results, as well as the direction of future work, are discussed.
File Size	291760
File Format	PDF
Language	English
Publisher Date	2000-01-01
Access Restriction	Open
Subject Keyword	Adiabatic Demagnetization Cooling Cryogenic Equipment Refrigerators Cryogenic Cooling Cryogenics Adiabatic Conditions Refrigerating Machinery Magnetic Cooling Demagnetization Low Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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