Source mass and positioning system for an accurate measurement of G
Anno: 2007
Autori: Lamporesi G., Bertoldi A., Cecchetti A., Dulach B., Fattori M., Malengo A., Pettorruso S., Prevedelli M., Tino G.M.
Affiliazione autori: LENS, Dipartimento di Fisica, Università 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, Università 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. Giornale/Rivista: REVIEW OF SCIENTIFIC INSTRUMENTS
Volume: 78 (7) Da Pagina: 075109-1 A: 075190-7
Parole chiavi: material analysis; tungsten alloy; DOI: 10.1063/1.2751090Citazioni: 23dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-05Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui