Title :
Toward the Determination of G With a Simple Pendulum
Author :
Berutto, Marco ; Ortolano, Massimo ; Mura, Alberto ; Periale, Felice ; De Marchi, Andrea
Author_Institution :
Dipt. di Elettronica, Politecnico di Torino
fDate :
4/1/2007 12:00:00 AM
Abstract :
An experiment aimed at the determination of the constant G was started in 1995 at the Politecnico di Torino, Torino, Italy, based on measurement of the period of a simple pendulum. Two source masses are periodically moved, orthogonally to the swinging plane, between two fixed positions. An optical system detects the pendulum perigee, and an electronic circuit measures the period. This paper describes recent progress and results, in which an unexpected effect, which is currently under investigation, limits the desired 10-4 uncertainty level to 3.2%
Keywords :
Q-factor measurement; gravitational constant; measurement uncertainty; pendulums; Q measurement; constant gravity; electronic circuit; gravity measurement; optical system; pendulum; Electrostatic measurements; Frequency estimation; Laser stability; Mathematical model; Noise measurement; Optical detectors; Optical pumping; Q factor; Q measurement; Volume measurement; $Q$ measurement; Gravity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.890785
