Interaction between Stray Electrostatic Fields and a Charged Free-Falling Test Mass
Interaction between Stray Electrostatic Fields and a Charged Free-Falling Test Mass
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DOI：
10.1103/physrevlett.108.181101
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发表时间：
2012-04-30
影响因子：
8.6
通讯作者：
Weber, W. J.
中科院分区：
文献类型：
--
作者：
Antonucci, F.;Cavalleri, A.;Weber, W. J.
我们提出了一个实验分析的力噪声所造成的杂散静电场作用于一个带电的测试质量内的导电外壳，精确的引力实验的一个关键问题。耦合到测试质量电荷的平均场及其波动的测量是用两种独立的扭摆技术进行的，包括直接测量由静电荷变化引起的力。我们分析了一个改进的静电模型，再加上实验数据的问题，也表明如何正确地测量和归零的杂散场与测试质量电荷相互作用。对于LISA引力波使命中杂散场和电荷之间的相互作用，我们的测量允许加速度噪声的保守上限，对于0.1 mHz以上的频率为2（fm/s（2））/Hz（1/2）。
We present an experimental analysis of force noise caused by stray electrostatic fields acting on a charged test mass inside a conducting enclosure, a key problem for precise gravitational experiments. Measurement of the average field that couples to the test mass charge, and its fluctuations, is performed with two independent torsion pendulum techniques, including direct measurement of the forces caused by a change in electrostatic charge. We analyze the problem with an improved electrostatic model that, coupled with the experimental data, also indicates how to correctly measure and null the stray field that interacts with the test mass charge. Our measurements allow a conservative upper limit on acceleration noise, of 2 (fm/s(2))/Hz(1/2) for frequencies above 0.1 mHz, for the interaction between stray fields and charge in the LISA gravitational wave mission.