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
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
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.
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.
LI Qing;LIU Lin-Xia;TU Liang-Cheng;SHAO Cheng-Gang;LUO Jun. Effect of Local Magnetic Field in G Measurement with Time-of-Swing Method[J]. 中国物理快报, 2010, 27(7): 70401-070401.
LI Qing, LIU Lin-Xia, TU Liang-Cheng, SHAO Cheng-Gang, LUO Jun. Effect of Local Magnetic Field in G Measurement with Time-of-Swing Method. Chin. Phys. Lett., 2010, 27(7): 70401-070401.
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2010, Vol. 27 
