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A Piezoelectric Cryogenic Heat SwitchWe have measured the thermal conductance of a mechanical heat switch actuated by a piezoelectric positioner, the PZHS (PieZo electric Heat Switch), at cryogenic temperatures. The thermal conductance of the PZHS was measured between 4 K and 10 K, and on/off conductance ratios greater than 100 were achieved when the positioner applied its maximum force of 8 N. We discuss the advantages of using this system in cryogenic applications, and estimate the ultimate performance of an optimized PZHS.
Document ID
20140012660
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
External Source(s)
doi:10.1063/1.4876483
Authors
Jahromi, Amir E. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Sullivan, Dan F. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 26, 2014
Publication Date
January 1, 2014
Subject Category
Fluid Mechanics And Thermodynamics
Solid-State Physics
Report/Patent Number
GSFC-E-DAA-TN15196
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Low temperature physics
Low Temperature
Cryogenics

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