Year: 2007
Type: article
Abstract: We report on a system of well-characterized source masses and their precision positioning system for a measurement of the Newtonian gravitational constant G using atoms as probes. The masses are 24 cylinders of 50 mm nominal radius, 150.2 mm nominal height, and mass of about 21.5 kg, sintered starting from a mixture of 95.3% W, 3.2% Ni, and 1.5% Cu. Density homogeneity and cylindrical geometry have been carefully investigated. The positioning system independently moves two groups of 12 cylinders along the vertical direction by tens of centimeters with a reproducibility of a few microns. The whole system is compatible with a resolution DeltaG/G<10(-4).
Source: Review of Scientific Instruments
DOI: 10.1063/1.2751090
Authors: G. Lamporesi, A. Bertoldi, A. Cecchetti, B. Duhlach, M. Fattori, A. Malengo, S. Pettorruso, M. Prevedelli, G. M. Tino
Language: English
Subfield: Statistics, Probability and Uncertainty
Field: Decision Sciences
Domain: Social Sciences
Open Access status: bronze
OpenAlex ID: W2014093777