T-T90 measurements using acoustic gas thermometer up to gallium melting point in neon gas

The difference between the thermodynamic temperature T and the temperature T90 based on the International Temperature Scale of 1990 (T−T90) has been measured using an acoustic gas thermometer (AGT) that worked on neon gas. A one-liter quasi-spherical resonator made of oxygen-free copper was introduc...

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Bibliographic Details
Main Authors: Widiatmo, Januarius V., Misawa, Tetsuro, Saito, Ikuhiko, Nakano, Tohru, Kawamura, Yasuki
Format: Conference Proceeding
Language:English
Subjects:
Acoustic resonance
Gallium
Melting points
Neon
Temperature scales
Thermodynamics
Thermometers
Thermometry
Uncertainty
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Summary:The difference between the thermodynamic temperature T and the temperature T90 based on the International Temperature Scale of 1990 (T−T90) has been measured using an acoustic gas thermometer (AGT) that worked on neon gas. A one-liter quasi-spherical resonator made of oxygen-free copper was introduced in the AGT to realize an acoustic resonance, from which the speed of sound in neon gas was determined. The thermodynamic temperature was derived based on the ratio of the speed of sound against the speed of sound at the triple point of water. (T-T90) has been determined at T90 of 283.15 K, 293.15 K and the gallium melting point, and the associated uncertainty was estimated. The (T−T90) obtained in the present work was found to agree within the estimated uncertainty with the currently reported values that exist in temperature range overlapping with the present work.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0236889