Article2014

The BIPM measurements of the Newtonian constant of gravitation, G

Terry Quinn · Clive C Speake · Harold Parks · Richard Davis

56 citations0/0 files storedPhilosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences

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Scientific Measurement and Uncertainty Evaluation Relativity and Gravitational Theory Advanced Measurement and Metrology Techniques

Abstract

This paper is a complement to the two short papers published in 2001 and 2013 in which we presented the results of the two BIPM determinations of the Newtonian constant of gravitation G. While this review contains no new results, it includes more detailed descriptions of certain key parameters that enter into the determination of G. Following a description of the overall method and the two versions of the experiment, we discuss the properties of the torsion strip, including the effects of anelasticity, then the electrostatic torque transducer, the source and test masses, dimensional metrology, angle measurement, the calculation and measurement of the moment of inertia, calculation of the torque, possible magnetic interactions and finally we discuss uncertainties and correlations in the derivation of a value for G.

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References

1987The 1986 adjustment of the fundamental physical constants 1982Redetermination of the Newtonian Gravitational Constant G 2001A New Determination of G Using Two Methods 2013Improved Determination of G Using Two Methods 1995Does the Time-of-Swing Method Give a Correct Value of the Newtonian Gravitational Constant?1942A new determination of the constant of gravitation 1995A new precise determination of Newton's gravitational constant

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2019Progress in Precise Measurements of the Gravitational Constant 2025CODATA recommended values of the fundamental physical constants: 2022 2016High-precision horizontally directed force measurements for high dead loads based on a differential electromagnetic force compensation system 2014Erratum: Improved Determination of G Using Two Methods [Phys. Rev. Lett. 111, 101102 (2013)]2017Realising traceable electrostatic forces despite non-linear balance motion

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