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High Resolution Thermometry for EXACTHigh Resolution Thermometers (HRTs) based on SQUID detection of the magnetization of a paramagnetic salt or a metal alloy has been commonly used for sub-nano Kelvin temperature resolution in low temperature physics experiments. The main applications to date have been for temperature ranges near the lambda point of He-4 (2.177 K). These thermometers made use of materials such as Cu(NH4)2Br4 *2H2O, GdCl3, or PdFe. None of these materials are suitable for EXACT, which will explore the region of the He-3/He-4 tricritical point at 0.87 K. The experiment requirements and properties of several candidate paramagnetic materials will be presented, as well as preliminary test results.
Document ID
20000075645
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
Authors
Panek, J. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Nash, A. E. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Larson, M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Mulders, N. (Delaware Univ. DE United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Inorganic, Organic And Physical Chemistry
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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