Microwave measurements for gas thermometry up to the copper point

Published: May 13, 2013


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


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

Download Paper


acoustic thermometry, primary thermometry, temperature scale, high temperatures, coaxial cables, acoustic resonator, microwave cavity resonator, speed of sound
Created May 13, 2013, Updated February 19, 2017