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PUBLICATIONS

Microwave measurements for gas thermometry up to the copper point

Published

Author(s)

XiaoJuan Feng, Keith A. Gillis, Michael R. Moldover, James B. Mehl

Abstract

We measured 5 microwave resonance frequencies fN of an argon-filled cylindrical cavity at temperatures up to 1349 K. The repeatability of both the measured frequencies u(fN) and the scaled half-widths u(gN)/ fN was better than 10-6fN. The measurement techniques are compatible with highly accurate acoustic gas thermometry up to the copper point at 1358 K and might be adaptable to refractive index gas thermometry.
Citation
Metrologia
Volume
50
Issue
3
Pub Type
Journals

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Keywords

acoustic thermometry, primary thermometry, temperature scale, high temperatures, coaxial cables, acoustic resonator, microwave cavity resonator, speed of sound
Thermometry metrology, Thermochemical properties and Materials characterization

Citation

Feng, X. , Gillis, K. , Moldover, M. and Mehl, J. (2013), Microwave measurements for gas thermometry up to the copper point, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=913447 (Accessed October 10, 2025)

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Created May 12, 2013, Updated October 12, 2021
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