Investigation of low-temperature fixed points by an international star intercomparison of sealed triple-point cells

Par Conseil national de recherches du Canada

DOI	Trouver le DOI : https://doi.org/10.1088/0026-1394/49/3/257
Auteur	Rechercher : Fellmuth, B.; Rechercher : Wolber, L.; Rechercher : Head, D. I.; Rechercher : Hermier, Y.; Rechercher : Hill, K. D.¹; Rechercher : Nakano, T.; Rechercher : Pavese, F.; Rechercher : Peruzzi, A.; Rechercher : Rusby, R. L.; Rechercher : Shkraba, V.; Rechercher : Steele, A. G.¹; Rechercher : Steur, P. P. M.; Rechercher : Szmyrka-Grzebyk, A.; Rechercher : Tew, W. L.; Rechercher : Wang, L.; Rechercher : White, D. R.
Affiliation	Conseil national de recherches du Canada. Institut des étalons nationaux de mesure du CNRC
Format	Texte, Article
Sujet	Experimental equipments; Filling technologies; Fixed points; Gas sources; Intercomparisons; International Temperature Scale of 1990; Low temperatures; Measurement programs; Melting curves; Thermal behaviours; Triple points; Argon; Hydrogen; Neon; Stars; Temperature; Source separation
Résumé	An overview of the results of an international star intercomparison of low-temperature fixed points is given. Between 1997 and 2005, 68 sealed triple-point cells (STPCs) of the twelve laboratories represented by the authors were investigated at PTB. The STPCs are used to realize the triple points of hydrogen, neon, oxygen and argon as defining fixed points of the International Temperature Scale of 1990, ITS-90. The melting curves (MCs) of all STPCs have been measured on the same experimental equipment, adhering strictly to a single measurement program. This protocol enables separation of the effects influencing the MCs and direct comparison of the thermal behaviour of the STPCs, which are quite different with respect to design, age, gas source and filling technology. In the paper, special emphasis is given to the spread of the liquidus-point temperatures and to the uncertainty of their determination. Connections between the star intercomparison and completed and ongoing international activities are also discussed. © 2012 BIPM & IOP Publishing Ltd.
Date de publication	2012-03-12
Dans	Metrologia 49, nº 3 (12 mars 2012) : 257–265.
Langue	anglais
Publications évaluées par des pairs	Oui
Numéro NPARC	21270141
Exporter la notice	Exporter en format RIS
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Identificateur de l’enregistrement	aaa4fb58-69a9-4536-8e32-622513b075db
Enregistrement créé	2014-01-06
Enregistrement modifié	2020-04-21

Date de modification :: 2025-02-07