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Reciprocating Magnetic RefrigeratorUnit cools to 4 K by adiabatic demagnetization. Two porous matrices of paramagnetic material gadolinium/gallium/garnet held in long piston called displacer, machined out of Micarta (phenol formaldehyde polymer). Holes in side of displacer allow heat-exchange fluid to flow to and through matrices within. Piston seals on displacer prevent substantial mixing of fluid in two loops. Magnetic refrigerator provides continuous rather than "one-shot" cooling.
Document ID
19850000107
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Johnson, D. L.
(CALTECH)
Date Acquired
August 12, 2013
Publication Date
June 1, 1985
Publication Information
Publication: NASA Tech Briefs
Volume: 9
Issue: 1
ISSN: 0145-319X
Subject Category
Machinery
Report/Patent Number
NPO-16257
Accession Number
85B10107
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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