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PUBLICATIONS

REFRACTIVE-INDEX GAS THERMOMETRY

Published

Author(s)

Patrick Rourke, Christof Gaiser, Roberto M. Gavioso, Michael R. Moldover, Laurent Pitre, Robin Underwood

Abstract

The principles and techniques of primary refractive-index gas thermometry (RIGT) are reviewed. Absolute primary RIGT using microwave measurements of helium-filled quasi-spherical resonators has been implemented at the temperatures of the triple points of neon, oxygen, argon and water, with relative standard uncertainties ranging from 9.1 x 10-6 to 3.5 x 10-5, and a sample uncertainty budget for this approach is provided. Researchers are now adapting cylindrical microwave resonators for RIGT at high temperatures and conducting relative RIGT measurements on isobars at low temperatures. RIGT at optical frequencies is progressing.
Citation
Metrologia
Volume
56
Pub Type
Journals

Download Paper

https://doi.org/10.1088/1681-7575/ab0dbe
Local Download

Keywords

thermometry, thermodynamic temperature, refractive index, microwave resonators, polarizability, virial coefficients
Thermometry metrology, Thermodynamics and Electrical / electromagnetic metrology

Citation

Rourke, P. , Gaiser, C. , Gavioso, R. , Moldover, M. , Pitre, L. and Underwood, R. (2019), REFRACTIVE-INDEX GAS THERMOMETRY, Metrologia, [online], https://doi.org/10.1088/1681-7575/ab0dbe, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926683 (Accessed May 1, 2024)

Created April 17, 2019, Updated October 12, 2021