Title :
The BIPM G experiment Mk II
Author :
Quinn, Terry ; Parks, Harold ; Speake, Clive ; Davis, Richard
Author_Institution :
BIPM, Sevres, France
Abstract :
This paper describes new work on the BIPM G experiment carried out since publication of the first results in 2001. The apparatus has been completely rebuilt and extensive tests carried out on the key parameters needed to produce a new value for G. The basic principles of the experiment remain the same, namely a torsion balance suspended from a wide thin Be-Cu strip with two modes of operation, free deflection and electrostatic servo-control. These two methods are substantially independent of each other. A new result for G will be presented at the CPEM.
Keywords :
balances; beryllium alloys; copper alloys; gravitational constant; measurement standards; servomechanisms; BIPM G experiment; Be-Cu; CPEM; Mk II experiment; torsion balance; Calibration; Electrostatics; Laboratories; Systematics; Temperature measurement; Torque; Uncertainty; Fundamental constants; G; Gravity; Newtonian constant; Torsion balance;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6250876
