NEWTONS GRAVITATIONAL CONSTANT WITH UNCERTAINTY LESS-THAN-100 PPM

Authors
FITZGERALD MP ARMSTRONG TR
Citation
Mp. Fitzgerald et Tr. Armstrong, NEWTONS GRAVITATIONAL CONSTANT WITH UNCERTAINTY LESS-THAN-100 PPM, IEEE transactions on instrumentation and measurement, 44(2), 1995, pp. 494-497
Citations number
11
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
Journal title
IEEE transactions on instrumentation and measurement → ACNP
ISSN journal
00189456
Volume
44
Issue
2
Year of publication
1995
Pages
494 - 497
Database
ISI
SICI code
0018-9456(1995)44:2<494:NGCWUL>2.0.ZU;2-I
Abstract
We have obtained a value for Newton's gravitational constant (coverage factor of 1) of G = 6.6656(6) x 10(-11) m(3) kg(-1).s(-2) with a comb ined standard uncertainty of 95 ppm. The method is based on a torsion balance which is servo-controlled to constant angular position with an electrostatically induced torque balancing the gravitationally induce d torque. This electrostatically induced torque is calibrated using an acceleration method.