Source mass and positioning system for an accurate measurement of G
Year: 2007
Authors: Lamporesi G., Bertoldi A., Cecchetti A., Dulach B., Fattori M., Malengo A., Pettorruso S., Prevedelli M., Tino G.M.
Autors Affiliation: LENS, Dipartimento di Fisica, Universitą di Firenze and INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy;
INFN-LNF, Via E. Fermi 40, 00044 Frascati (Roma), Italy;
INRIM, Strada delle Cacce 91, 10100 Torino, Italy;
Dipartimento di Chimica Fisica e Inorganica, Universitą di Bologna, Via del Risorgimento 4, 40136 Bologna, Italy
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 Delta G/G < 10(-4). (C) 2007 American Institute of Physics. Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS
Volume: 78 (7) Pages from: 075109-1 to: 075190-7
KeyWords: material analysis; tungsten alloy; DOI: 10.1063/1.2751090ImpactFactor: 1.384Citations: 23data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-03References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here
