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Effect of Local Magnetic Field in G Measurement with Time-of-Swing Method |
LI Qing1, LIU Lin-Xia2, TU Liang-Cheng1, SHAO Cheng-Gang1, LUO Jun1 |
| 1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 2Department of Electronics and Communication Engineering, Henan Mechanical and Electrical Engineering College, Xinxiang 453002 |
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| Cite this article: |
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LI Qing, LIU Lin-Xia, TU Liang-Cheng et al 2010 Chin. Phys. Lett. 27 070401 |
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Abstract The effect of the local time-varying magnetic field in our G measurement with the time-of-swing method is studied by magnifying the magnetic field to cause a perceptible change in the pendulum's period. The experimental result shows that the coefficients of the change in the period to the magnetic field are 37(1) and 12(1) ms/gauss in the two horizontal directions respectively, which means that the systematic uncertainty due to the local magnetic field is less than 0.4 ppm in our G measurement.
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| Keywords:
04.80.Cc
06.20.Jr
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Received: 25 January 2010
Published: 28 June 2010
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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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