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New Standards of Mass

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Abstract

In this chapter we discuss the efforts to redefine the unit of mass, the kilogram, and to develop a standard adequate to the new definition. The kilogram is likely to be redefined in relation to Planck’s constant. The work in progress discussed in this chapter aims to determine Planck’s constant by means of a watt balance and the Avogadro constant by counting the number of atoms in a mass standard of monocrystalline silicon 28Si (XRCD method). For the new definition to be adopted the uncertainty of the results of measurements performed by three different teams should be better than 5 × 10−8 and the results obtained by different methods should agree. Apart from the two methods mentioned above, we discuss the development of a mass standard based on the accumulation of heavy metal ions of gold (197Au) and bismuth (209Bi).

Keywords

Magnetic Flux Silicon Crystal Silicon Sample Mass Standard Magnetic Levitation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    P. Becker, M. Gläser, Avogadro constant and ion accumulation: steps towards a redefinition of the SI unit of mass. Meas. Sci. Technol. 14, 1249–1258 (2003)CrossRefADSGoogle Scholar
  2. 2.
    V. Bego, J. Butorac, D. Ilić, Realisation of the kilogram by measuring at 100 kV with the voltage balance ETF, IEEE Trans. Instrum. Meas. 1999, 48212–48215Google Scholar
  3. 3.
    U. Bonse, M. Hart, An X-ray interferometer. Appl. Phys. Lett. 6, 155–156 (1965)CrossRefADSGoogle Scholar
  4. 4.
    Y. Fujii, Y. Miki, F. Shiota, T. Morokuma, Mechanism for levitated superconductor experiment. IEEE Trans. Instrum. Meas. 50, 580–582 (2001)CrossRefGoogle Scholar
  5. 5.
    Y. Fujii, Possible contribution of levitating mass to force measurement. Metrologia 38, 83–84 (2001)CrossRefADSGoogle Scholar
  6. 6.
    B.P. Kibble, I.A. Robinson, Replacing the kilogram. Meas. Sci. Technol. 14, 1243–1248 (2003)CrossRefADSGoogle Scholar
  7. 7.
    A.J. Leistner, W.J. Giardini, Fabrication and sphericity measurements of single-crystal silicon sphere, Metrologia, 31, 231–234 (1995)Google Scholar
  8. 8.
    M.I. Mills, P.J. Mohr, T.J. Quinn, B.N. Taylor, E.R. Williams, Redefinition of the kilogram: a decision whose time has come. Metrologia 42, 71–80 (2005)CrossRefADSGoogle Scholar
  9. 9.
    M.I. Mills, P.J. Mohr, T.J. Quinn, B.N. Taylor, E.R. Williams, Redefinition of the kilogram, ampere, kelvin and mole: a proposed approach to implementing CIPM recommendation 1. Metrologia 43, 227–246 (2006)CrossRefADSGoogle Scholar
  10. 10.
    P.J. Mohr, B.N. Taylor, CODATA recommended values of the fundamental physical constants: 2002. Rev. Mod. Phys. 77, 1–106 (2005)CrossRefADSGoogle Scholar
  11. 11.
    M. Stock, The watt balance: determination of the Planck constant and redefinition of the kilogram. Phil. Trans. Royal Soc. A 369, 3936–3953 (2011)CrossRefADSGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Faculty of Electronics and TelecommunicationsPoznan University of TechnologyPoznanPoland

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