A New Determination of G

Published

October 12, 2021

Author(s)

J P. Schwarz, J E. Faller, T M. Niebauer, F Klopping, D S. Robertson, G Sasagawa

Abstract

A short test run of the apparatus was conducted in February 1997 and gave promising results. A difference signal of about 80 υGal was observed, with reasonable scatter in G values from day to day. A sample of the data is seen in figure 1. This scatter currently limits the precision of the experiment. At the Table Mountain Gravity Observatory where the experiment is located, 6 υGal is a low-end estimate of the scatter of drops made by a standard FG-5. Assuming that this noise is Gaussian, a two week data run would give a differential precision of .04 υGal for a signal of about 80 υGal. This would be a .05 % experiment in G, if the other error sources are kept below this noise level. To increase the precision by an additional factor of two, it would be necessary to run the experiment for two months which is not practical. A two week data is feasible, and thus we expect to make a .05 % determination of G which will significantly contribute to the resolution of discrepancies in recent measurements.

Citation

A.G.U. Chapman Conference on Microg-1 Gravimetry

Pub Type

Journals

Keywords

fundamental standards, gravity, Newtonian constant of gravitation, precision measurement

Citation

Schwarz, J. , Faller, J. , Niebauer, T. , Klopping, F. , Robertson, D. and Sasagawa, G. (2021), A New Determination of G, A.G.U. Chapman Conference on Microg-1 Gravimetry (Accessed December 7, 2024)