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

Chin. Phys. Lett.

2005, Vol. 22

Issue (9): 2169-2172 DOI:

Original Articles

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

LUO Jie¹;WANG Dian-Hong¹;LIU Qi²;SHAO Cheng-Gang²

¹Faculty of Mechanical and Electronic Engineering, China University of Geosciences, Wuhan 430074 ²Department of Physics, Huazhong University of Science and Technology, Wuhan 430074

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LUO Jie, WANG Dian-Hong, LIU Qi et al 2005 Chin. Phys. Lett. 22 2169-2172

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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.

Keywords: 04.80.Cc

Published: 01 September 2005

PACS:

04.80.Cc

(Experimental tests of gravitational theories)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I9/02169

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