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Determination of the Planck constant using a watt balance with a superconducting magnet system at the National Institute of Standards and Technology

Published

Author(s)

Stephan Schlamminger, Darine El Haddad, Frank C. Seifert, Leon S. Chao, David B. Newell, Richard L. Steiner, Jon R. Pratt

Abstract

In the past two years measurements were performed with a watt balance at the National Institute of Standards and Technology (NIST) to determine the Planck constant. A detailed analysis of these measurements and their uncertainties led to a value of h=6.626 069 88(38) x 10^-34 Js. The relative uncertainty is 57 x 10^-9 . This result is 154 x 10^-9 higher than h90
Citation
Metrologia
Volume
51

Keywords

Planck constant, electronic kilogram
Created March 31, 2014, Updated November 10, 2018