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Proposed Pressure Standard Based on Capacitance Measurements



Michael R. Moldover


We propose to measure the dielectric constant [epsilon] and the thermodynamic temperatue T of helium near 273.16 K and to calculate the pressure p([epsilon],T) of the helium from the fundamental constants, quantum mechanics, and statistical mechanics. If the molar polarizability of helium A[epsilon] is calculated more accurately, the proposed pressure standard might attain relative standard uncertainty of 6 x 10-6 for pressures near 1 Mpa, a result of considerable interest to pressure metrology.
Proceedings Title
1998 Conference on Precision Electromagnetic Measurements Digest
Conference Dates
July 6-10, 1998
Conference Title
Conference on Precision Electromagnetic Measurements


ab initio calculations, dielectric constant, helium, polarizability, pressure standard
Created July 1, 1998, Updated February 17, 2017