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Publication Citation: Microwave measurements for gas thermometry up to the copper point

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Author(s): XiaoJuan Feng; Keith A. Gillis; Michael R. Moldover; James B. Mehl;
Title: Microwave measurements for gas thermometry up to the copper point
Published: May 13, 2013
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
Pages: pp. 219 - 226
Keywords: acoustic thermometry; primary thermometry; temperature scale; high temperatures; coaxial cables; acoustic resonator; microwave cavity resonator; speed of sound
Research Areas: Materials Properties, SI (Thermodynamics Units), Thermometry, Thermophysics
PDF version: PDF Document Click here to retrieve PDF version of paper (2MB)