Effect of Local Magnetic Field in G Measurement with Time-of-Swing Method
Effect of Local Magnetic Field in G Measurement with Time-of-Swing Method
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DOI：
10.1088/0256-307x/27/7/070401
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发表时间：
2010-07
影响因子：
3.5
通讯作者：
Li Qing;Liu Lin-xia;Tu Liang-Cheng;Shao Chenggang;L. Jun
中科院分区：
文献类型：
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作者：
Li Qing;Liu Lin-xia;Tu Liang-Cheng;Shao Chenggang;L. Jun
通过放大磁场使钟摆的周期发生明显变化，研究了在我们的摆动时间法G测量中局部时变磁场的影响。实验结果表明，在两个水平方向上，周期对磁场的变化系数分别为37（1）和12（1）ms/高斯，这意味着在我们的G测量中，由局部磁场引起的系统不确定度小于0.4ppm。
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 0.4ppm in our G measurement.