Source mass and positioning system for an accurate measurement of G.
Rev Sci Instrum
; 78(7): 075109, 2007 Jul.
Article
en En
| MEDLINE
| ID: mdl-17672795
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).
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Calibración
/
Gravitación
/
Micromanipulación
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Rev Sci Instrum
Año:
2007
Tipo del documento:
Article
País de afiliación:
Italia