NDLI: Progress in the development of a continuous adiabatic demagnetization refrigerator

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Progress in the development of a continuous adiabatic demagnetization refrigerator

Content Provider	NASA Technical Reports Server (NTRS)
Author	Canavan, Edgar Jackson, Michael Tuttle Sr., James Shirron, Peter DiPirro, Michael King, Todd
Copyright Year	2002
Description	We report on recent progress in the development of a continuous adiabatic demagnetization refrigerator (CADR). Continuous operation avoids the constraints of long hold times and short recycle times that lead to the generally large mass of single-shot ADRs, allowing us to achieve an order of magnitude larger cooling power per unit mass. Our current design goal is 10 micro W of cooling at 50 mK using a 6-10 K heat sink. The estimated mass is less than 10 kg, including magnetic shielding of each stage. The relatively high heat rejection capability allows it to operate with a mechanical cryocooler as part of a cryogen-free, low temperature cooling system. This has the advantages of long mission life and reduced complexity and cost. We have assembled a three-stage CADR and have demonstrated continuous cooling using a superfluid helium bath as the heat sink. The temperature stability is 8 micro K rms or better over the entire cycle, and the cooling power is 2.5 micro W at 60 mK rising to 10 micro W at 100 mK.
File Size	468089
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20020080809
Archival Resource Key	ark:/13960/t6k121n6n
Language	English
Publisher Date	2002-06-03
Access Restriction	Open
Subject Keyword	Refrigerators Cryogenic Cooling Coolers Cost Reduction Cooling Systems Life Cycle Costs Thermal Stability Baths Magnetic Shielding Fabrication Adiabatic Conditions Magnetic Fields Magnetic Cooling Heat Sinks Demagnetization 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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