NASA NTRS · 19850000107
Reciprocating Magnetic Refrigerator
Abstract
Unit 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.
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Johnson, D. L.. 1985-06-01. Reciprocating Magnetic Refrigerator. https://ntrs.nasa.gov/citations/19850000107
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