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Proposed Pressure Standard Based on Capacitance Measurements

Published

Author(s)

Michael R. Moldover

Abstract

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

Keywords

ab initio calculations, dielectric constant, helium, polarizability, pressure standard

Citation

Moldover, M. (1998), Proposed Pressure Standard Based on Capacitance Measurements, 1998 Conference on Precision Electromagnetic Measurements Digest (Accessed September 25, 2023)
Created July 1, 1998, Updated February 17, 2017