Article2005

Precise Determination of Period of a Torsion Pendulum in Measurement of Gravitational Constant

Jie Hong Luo · Dianhong Wang · Qi Liu · Shao Cheng-Gang

8 citations0/0 files storedChinese Physics Letters

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Scientific Measurement and Uncertainty Evaluation Experimental and Theoretical Physics Studies Geophysics and Gravity Measurements

Abstract

The period of a torsion pendulum would vary under the disturbances of environmental noise factors. In order to subtract the period of the pendulum from external influence, we employ the correlation method to determine the period with a high precision. Theoretical analysis shows that the relative precision is improved to be proportional to 1/ m 3/2 with the number of the period m , compared with the conventional statistical mean that is proportional to 1/ m 1/2 , which is significant for the determination of gravitational constant with the swing time method.

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1987Random data: Analysis and measurement procedures 1999CODATA Recommended Values of the Fundamental Physical Constants: 1998 2000Measurement of Newton's Constant Using a Torsion Balance with Angular Acceleration Feedback 2001A New Determination of G Using Two Methods 2003New Measurements of G Using the Measurement Standards Laboratory Torsion Balance 2002Determination of the Gravitational Constant with a Beam Balance 2000Status of measurement of the Newtonian gravitational constantG 1999Nonlinearity of tungsten fiber in the time-of-swing method

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