Title :
An improved BIPM torsion-strip balance for determining G
Author :
Quinn, T.J. ; Parks, H.V. ; Speake, C.C. ; Picard, A. ; Davis, R.S.
Author_Institution :
Bur. Int. des Poids et Mesures, Sevres, France
Abstract :
Reports progress of a programme to measure the Newtonian constant of gravitation, G, with a torsion strip balance using several different methods. We have recently published a result with an uncertainty of 41 parts per million (ppm). The present efforts are aimed at reducing this uncertainty to about 10 ppm.
Keywords :
balances; gravitational constant; measurement uncertainty; BIPM; Bureau International des Poids et Mesures; Newtonian constant of gravitation; torsion-strip balance; uncertainty; Earth; Extraterrestrial measurements; Force control; Force measurement; Laboratories; Mirrors; Physics; Strips; Testing; Torque;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034846
