Volume 8-9

Dissemination of the SI mass unit from the National Prototype of Kilogram using the vacuum mass comparator after the mass unit redefinition

Authors Rafał L. Ossowski - Central Office of Measures (Główny Urząd Miar)

Abstract

This article discussed one of the method for the mass dissemination from the national mass standard using the high vacuum mass comparator after the redefinition of the mass unit which was scheduled for 2018. The mass unit redefinition based on the Avogadro project and the Watt balance project requires to develop a new coherent methods for mass dissemination from the national prototypes to the usable and commercial reference mass standards. The new methods should guarantee higher accuracy then the methods which are currently applying. The right direction seems to be the one chosen by the leading NMI’s in Europe (like PTB & CMI) consisting in the mass unit dissemination in the vacuum and other gases than air conditions.

Bibliography

[1] R. Davis: The SI unit of mass. Metrologia, vol. 40 (2003), p. 299.
[2] Consultative Committee for Mass and Related Quantities (CCM): Report of the 12th meeting (26 March 2010) to the International Committee for Weights and Measures. Bureau International des Poids et Mesures, Sevres.
[3] Resolutions adopted by the General Conference on Weights and Measures (24th meeting), Paris, 17-21 October 2011.
[4] M. Stock: Watt balance experiments for the determination of the Planck constant and the redefinition of the kilogram. Metrologia, vol. 50 (2013), p. R1.
[5] B. Andreas et al.: Determination of the Avogadro Constant by Counting the Atoms in a Si28 Crystal. Phys. Rev. Lett., vol 106 (2011), 03080.
[6] R. L. Ossowski: Przegląd aktualnej wiedzy na temat prowadzonych badań nad redefinicją jednostki masy – stan na koniec roku 2013. Biuletyn GUM nr 1-2/2014, s. 25.
[7] P. J. Mohr, B. N. Taylor, D. B. Newell: CODATA Recommended Values of the Fundamental Physical Constants: 2010. Reviews of Modern Physics, vol. 84 (2012), p.1527.
[8] K. Marti, P. Fuchs, S. Russi: Cleaning of mass standards: II. A comparison of new techniques applied to actual and potential new materials for mass standards. Metrologia, vol. 50 (2013), p. 83.
[9] K. Marti, P. Fuchs, S. Russi: Cleaning of mass standards: a comparison of new and old techniques. Metrologia, vol. 49 (2012), p. 628.

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Metrology and Hallmark is devoted to the multidisciplinary study and practice of high accuracy engineering and metrology. The journal takes novel achievements in all fields of measurement and instruments science & technology.

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