We report on a system of well-characterized source masses and their precision positioning system for a measurement of the Newtonian gravitational constantG using atoms as probes. The masses are 24 cylinders of 50mm nominal radius, 150.2mm nominal height, and mass of about 21.5kg, 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 ΔG/G<10−4.

Source Mass and positioning system for an accurate measurement of G / G. Lamporesi; A. Bertoldi; A. Cecchetti; B. Duhlach; M. Fattori; A. Malengo; S. Pettorruso; M. Prevedelli; G.M. Tino. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - STAMPA. - 78:(2007), pp. 075109-1-075109-7.

Source Mass and positioning system for an accurate measurement of G

BERTOLDI, ANDREA;FATTORI, MARCO;PREVEDELLI, MARCO;TINO, GUGLIELMO MARIA
2007

Abstract

We report on a system of well-characterized source masses and their precision positioning system for a measurement of the Newtonian gravitational constantG using atoms as probes. The masses are 24 cylinders of 50mm nominal radius, 150.2mm nominal height, and mass of about 21.5kg, 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 ΔG/G<10−4.
2007
78
075109-1
075109-7
G. Lamporesi; A. Bertoldi; A. Cecchetti; B. Duhlach; M. Fattori; A. Malengo; S. Pettorruso; M. Prevedelli; G.M. Tino
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/316414
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