Developing primary acoustic gas thermometry above 400 K

Résumé fourni par la source

We present recent progress in the development of four primary acoustic gas thermometry (AGT) experiments designed to work from around 300 K up to maximum temperatures between 505 K and 1358 K. The reported results include high precision measurements of microwave and acoustic resonances in cavities comprised of different materials, geometry and dimensions. We critically review the experimental techniques developed to address the principal challenges of high-temperature AGT (HT-AGT), including the transmission of acoustic and microwave signals between the cavity resonator and the laboratory environment, the achievement of a high degree of thermal uniformity throughout the apparatus, and the preservation of thermometric gas purity. We discuss the future prospects of these experiments, and highlight unresolved challenges in the HT-AGT method which require further research efforts.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.