Chin. Phys. Lett.  2010, Vol. 27 Issue (7): 070401    DOI: 10.1088/0256-307X/27/7/070401
GENERAL |
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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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.

Keywords: 04.80.Cc      06.20.Jr     
Received: 25 January 2010      Published: 28 June 2010
PACS:  04.80.Cc (Experimental tests of gravitational theories)  
  06.20.Jr (Determination of fundamental constants)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/7/070401       OR      https://cpl.iphy.ac.cn/Y2010/V27/I7/070401
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LI Qing
LIU Lin-Xia
TU Liang-Cheng
SHAO Cheng-Gang
LUO Jun
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