Improving the measurement sensitivity of angular deflection of a torsion pendulum by an electrostatic spring
Improving the measurement sensitivity of angular deflection of a torsion pendulum by an electrostatic spring
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静电弹簧提高扭摆角偏转测量灵敏度
DOI：
10.1088/0264-9381/32/17/175018
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发表时间：
2015-09-10
影响因子：
3.5
通讯作者：
Zhou, Z. B.
中科院分区：
文献类型：
--
作者：
Bai, Y. Z.;Fang, L.;Zhou, Z. B.
扭摆作为一种弱力敏仪器广泛应用于引力实验中，其分辨率受到摆的热噪声和角偏转探测噪声的限制。提出并实现了不同类型的角偏转传感器，以提高其分辨率。为了提高角位移测量的灵敏度，本文提出了一种静电弹簧扭摆。噪声分析和演示实验表明，静电扭摆可以放宽角位移检测的要求，适用于精度要求更高的重力实验。
The torsion pendulum is widely employed in gravitational experiments as a weak force sensitive instrument, and its resolution is limited by the thermal noise of the pendulum and detection noise of angular deflection. Different kinds of angular deflection transducers are proposed and realized to improve its resolution. A torsion pendulum combined with an electrostatic spring is proposed here in order to improve the measurement sensitivity of angular deflection. Noise analysis and demonstration experiments show that the electrostatic torsion pendulum can relax the requirement of angular deflection detection, which is useful for gravitational experiments with much higher precision requirements.