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Determination of the Unperturbed Period of a Torsion Pendulum in the Time-of-Swing Method |
| LUO Jun;HU Zhong-kun;LUO Xu-jun;WU Zi-gang |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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LUO Jun, HU Zhong-kun, LUO Xu-jun et al 1999 Chin. Phys. Lett. 16 867-869 |
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Abstract A symmetric disc-shaped torsion pendulum was designed to study the nonlinear effects of the torsion fiber. It was showed that the period of the pendulum decreases with the amplitude of the oscillation. Determination of the unperturbed period through a fit to measured data of the period variation with amplitude shows that this systematic error in the measurement of Newtonian gravitational constant G by the time-of-swing method can be reduced by an order of the magnitude at least.
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| Keywords:
04.80.Cc
06.20.Jr
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Published: 01 December 1999
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| PACS: |
04.80.Cc
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(Experimental tests of gravitational theories)
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06.20.Jr
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(Determination of fundamental constants)
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