Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Woolliams, Emma; Anhalt, K.; Ballico, Mark; Bloembergen, P.; Bourson, F.; Briaudeau, S.; Campos, Jesús; Cox, M G; Campo, D. del; Wei, Dong; Dury, M. R.; Gavrilov, V. R.; Grigoryeva, Irina; Hernanz, María Luisa; Jahan, F.; Khlevnoy, B. B.; Khromchenko, Vladimir B.; Lowe, D.; Lu, X.; Machin, G.; Mantilla, J. M.; Martı́n, M. J.; McEvoy, H C; Rougié, B.; Sadli, M.; Salim, S. G. R.; Sasajima, N.; Taubert, D. R.; Todd, A. D. W.; Bossche, Rafael Van den; Ham, Eric; Wang, T.; Whittam, Aaron; Wilthan, Boris; Woods, D.; Woodward, John T.; Yamada, Yoshiro; Yamaguchi, Yu; Yoon, Howard W.; Yuan, Z.

doi:10.1098/rsta.2015.0044

Cited by 68 publications

(93 citation statements)

References 48 publications

(72 reference statements)

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“…HTFP cells have been circulated among five partners over a period of more than one year and have shown that they can be considered as suitable means to probe and compare the capabilities between different realisations of the scale or of thermodynamic temperatures as the WP1 of InK has already proved [13].…”

Section: Preliminary Results and Discussionmentioning

confidence: 99%

Experimental assessment of methods of dissemination of the thermodynamic temperature at the highest temperatures

Sadli

Anhalt

Bourson

et al. 2015

17th International Congress of Metrology

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Abstract. In the frame of the European Metrology Research Programme (EMRP)-funded joint research project "Implementing the new kelvin" one work package is devoted to the assessment of two different methods of dissemination of the thermodynamic temperature. These two methods are the dissemination via high temperature fixed points (HTFP) with assigned thermodynamic temperatures and the dissemination by radiometers or radiation thermometers calibrated in terms of thermodynamic temperature. To achieve a thorough assessment of these two distinct dissemination methods two dissemination exercises were organised in the form of comparisons. In one case the circulating artefacts were off-the-shelf high-temperature fixed point cells with transition temperatures ranging from 1324 °C to 2474 °C, in the other case absolutely calibrated pyrometers and filter radiometers were compared in the temperature range 1000 °C to 2500 °C. This work showed that both schemes were achievable with competing advantages and drawbacks and would most probably help disseminating thermodynamic temperature in the future at the level of 1 K to 2 K uncertainty over the whole temperature range.Résumé. Dans le cadre du projet de recherche concertée financé par le programme européen de recherche en métrologie (EMRP) "Implementing the new kelvin", un des lots de tâches, le workpackage 2, s'attèle à l'évaluation de deux méthodes différentes de dissémination de la température thermodynamique : une méthode reposant sur l'usage de cellules points fixes à hautes températures, ayant des températures thermodynamiques affectées à leurs transitions de phase ; une seconde méthode reposant sur la dissémination à l'aide de pyromètres étalonnés en absolu ou de radiomètres à filtres traçables au radiomètre cryogénique à substitution électrique. Afin de réaliser une évaluation complète des deux méthodes, deux comparaisons ont été organisées entre laboratoires européens dans un cas en utilisant un lot de cellules à points fixes à haute température entre 1324 °C et 2474 °C et dans l'autre cas en réunissant dans un même laboratoire, le PTB, quatre instruments étalonnés en absolu et en les comparant face à un corps noir de température variable entre 1000 °C et 2500 °C. Cette étude a prouvé en premier lieu que les deux méthodes peuvent être mise en oeuvre avec succès et peuvent servir, en fonction des équipements disponibles en laboratoire, d'excellents moyens pour la dissémination de la température thermodynamique avec des incertitudes de l'ordre de 1 K à 2 K sur tout le domaine de température.

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Section: Preliminary Results and Discussionmentioning

confidence: 99%

Experimental assessment of methods of dissemination of the thermodynamic temperature at the highest temperatures

Sadli

Anhalt

Bourson

et al. 2015

17th International Congress of Metrology

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“…HTFP cells have been circulated among five partners over a period of more than one year and have shown that they can be considered as suitable means to probe and compare the capabilities between different realisations of the temperature scale or of thermodynamic temperatures as the WP1 of InK has already proved [13].…”

Section: Preliminary Findings and Discussionmentioning

confidence: 99%

“…-LNE-Cnam applied a similar scheme as CEM, which involved the calibration of the LNECnam LP3 pyrometer, except that the HTFP cells used were directly measured in terms of thermodynamic temperature using the LNECnam radiance method put in application in the WP1 of InK [13]. The cells used for the calibration of LNE-Cnam LP3 pyrometer had the local assigned thermodynamic temperatures as given in Table 3.…”

Section: Dissemination Using Absolutely Calibrated Filter Radiometersmentioning

confidence: 99%

Erratum to: Experimental assessment of thermodynamic temperature dissemination methods at the highest temperatures

Sadli

Anhalt

Bourson

et al. 2015

17th International Congress of Metrology

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Due to problems that have occurred during the conversion of the article into PDF format, and the resulting loss of many special characters, a new correct version of the article is published below.Abstract. In the frame of the European Metrology Research Programme (EMRP)-funded joint research project "Implementing the new kelvin" one work package is devoted to the assessment of two different methods of dissemination of the thermodynamic temperature. These two methods are the dissemination via high temperature fixed points (HTFP) with assigned thermodynamic temperatures and the dissemination by radiometers or radiation thermometers calibrated in terms of thermodynamic temperature. To achieve a thorough assessment of these two distinct dissemination methods two dissemination exercises were organised in the form of comparisons. In one case the circulating artefacts were off-the-shelf high-temperature fixed point cells with transition temperatures ranging from 1324 °C to 2474 °C, in the other case absolutely calibrated pyrometers and filter radiometers were compared in the temperature range 1000 °C to 2500 °C. This work showed that both schemes offered suitable routes for dissemination with competing advantages and drawbacks and would most probably help disseminating thermodynamic temperature in the future at the level of 1 K to 2 K uncertainty over the whole temperature range.Résumé. Dans le cadre du projet de recherche concertée financé par le programme européen de recherche en métrologie (EMRP) "Implementing the new kelvin", un des lots de tâches, le workpackage 2, s'attèle à l'évaluation de deux méthodes différentes de dissémination de la température thermodynamique : une méthode reposant sur l'usage de cellules points fixes à hautes températures, ayant des températures thermodynamiques affectées à leurs transitions de phase ; une seconde méthode reposant sur la dissémination à l'aide de pyromètres étalonnés en absolu ou de radiomètres à filtres traçables au radiomètre cryogénique à substitution électrique. Afin de réaliser une évaluation complète des deux méthodes, deux comparaisons ont été organisées entre laboratoires européens dans un cas en utilisant un lot de cellules à points fixes à haute température entre 1324 °C et 2474 °C et dans l'autre cas en réunissant dans un même laboratoire, le PTB, quatre instruments étalonnés en absolu et en les comparant face à un corps noir de température variable entre 1000 °C et 2500 °C. Cette étude a prouvé en premier lieu que les deux méthodes peuvent être mise en oeuvre avec succès et peuvent servir, en fonction des équipements disponibles en laboratoire, d'excellents moyens pour la dissémination de la température thermodynamique avec des incertitudes de l'ordre de 1 K à 2 K sur tout le domaine de température.

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“…Single-wavelength absolute radiometry has been successfully and extensively used over the last two decades to measure the temperature of the phase transitions of HTFPs. Recent results on Re-C cells are for example given in [2].…”

Section: Single-wavelength Absolute Radiometrymentioning

confidence: 99%

“…The currently ongoing improvements to the high-temperature range of the ITS-90, i.e., the development of novel high-temperature fixed points (HTFP) and their formal implementation into an improved temperature scale with the mise en pratique for the definition of the kelvin, rely solely on thermodynamic temperature measurements based on singlewavelength absolute radiometry traceable to the cryogenic radiometer (CR) [2]. The wording "single-wavelength" for a narrow band filter radiometer is used to distinguish from "double-wavelength method".…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Temperature of High-Temperature Fixed Points Traceable to Blackbody Radiation and Synchrotron Radiation

et al. 2017

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Absolute spectral radiometry is currently the only established primary thermometric method for the temperature range above 1300 K. Up to now, the ongoing improvements of high-temperature fixed points and their formal implementation into an improved temperature scale with the mise en pratique for the definition of the kelvin, rely solely on single-wavelength absolute radiometry traceable to the cryogenic radiometer. Two alternative primary thermometric methods, yielding comparable or possibly even smaller uncertainties, have been proposed in the literature. They use ratios of irradiances to determine the thermodynamic temperature traceable to blackbody radiation and synchrotron radiation. At PTB, a project has been established in cooperation with VNIIOFI to use, for the first time, all three methods simultaneously for the determination of the phase transition temperatures of high-temperature fixed points. For this, a dedicated four-wavelengths ratio filter radiometer was developed. With all three thermometric methods performed independently and in parallel, we aim to compare the potential and practical limitations of all three methods, disclose possibly undetected systematic effects of each method and thereby confirm or improve the previous measurements traceable to the cryogenic radiometer. This will give further and independent confidence in the thermodynamic temperature determination of the high-temperature fixed point's phase transitions.

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Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Cited by 68 publications

References 48 publications

Experimental assessment of methods of dissemination of the thermodynamic temperature at the highest temperatures

Experimental assessment of methods of dissemination of the thermodynamic temperature at the highest temperatures

Erratum to: Experimental assessment of thermodynamic temperature dissemination methods at the highest temperatures

Thermodynamic Temperature of High-Temperature Fixed Points Traceable to Blackbody Radiation and Synchrotron Radiation

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