التفاصيل البيبلوغرافية
| العنوان: |
Influence of tungsten fiber's slow drift on the measurement of G with angular acceleration method. |
| المؤلفون: |
Jie Luo, Wei-Huang Wu, Chao Xue, Cheng-Gang Shao, Wen-Ze Zhan, Jun-Fei Wu, Milyukov, Vadim |
| المصدر: |
Review of Scientific Instruments; Aug2016, Vol. 87 Issue 8, p084501-1-084501-6, 6p, 1 Diagram, 4 Graphs |
| مصطلحات موضوعية: |
TUNGSTEN fibers, GRAVITATIONAL constant, ANGULAR acceleration, TORSION pendulums, DRIFT diffusion models |
| مستخلص: |
In the measurement of the gravitational constant G with angular acceleration method, the equilibrium position of torsion pendulum with tungsten fiber undergoes a linear slow drift, which results in a quadratic slow drift on the angular velocity of the torsion balance turntable under feedback control unit. The accurate amplitude determination of the useful angular acceleration signal with known frequency is biased by the linear slow drift and the coupling effect of the drifting equilibrium position and the room fixed gravitational background signal. We calculate the influences of the linear slow drift and the complex coupling effect on the value of G, respectively. The result shows that the bias of the linear slow drift on G is 7 ppm, and the influence of the coupling effect is less than 1 ppm. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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