• DocumentCode
    767378
  • Title

    Newton´s gravitational constant with uncertainty less than 100 ppm

  • Author

    Fitzgerald, M.P. ; Armstrong, T.R.

  • Author_Institution
    Gracefield Res. Centre, New Zealand Inst. of Ind. Res., Lower Hutt, New Zealand
  • Volume
    44
  • Issue
    2
  • fYear
    1995
  • fDate
    4/1/1995 12:00:00 AM
  • Firstpage
    494
  • Lastpage
    497
  • Abstract
    We have obtained a value for Newton´s gravitational constant (coverage factor of 1) of G=6.6656(6)×10-11 m3 kg-1·s-2 with a combined standard uncertainty of 95 ppm. The method is based on a torsion balance which is servocontrolled to constant angular position with an electrostatically induced torque balancing the gravitationally induced torque. This electrostatically induced torque is calibrated using an acceleration method
  • Keywords
    balances; fundamental law tests; gravitational constant; measurement errors; physical instrumentation control; servomechanisms; torque control; Newton´s gravitational constant; acceleration method; constant angular position; electrostatically induced torque; servocontrol; standard uncertainty; torsion balance; Acceleration; Accelerometers; Density measurement; Electrodes; Electrostatic measurements; Mirrors; Position measurement; Torque control; Torque measurement; Uncertainty;
  • fLanguage
    English
  • Journal_Title
    Instrumentation and Measurement, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9456
  • Type

    jour

  • DOI
    10.1109/19.377890
  • Filename
    377890
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=767378