Statistics – Applications
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012cqgra..29e5010l&link_type=abstract
Classical and Quantum Gravity, Volume 29, Issue 5, pp. 055010 (2012).
Statistics
Applications
Scientific paper
In order to suppress the electrostatic and magnetic field effects, ultrathin metal wires are often employed for discharging the proof mass which is used in a high-precision space electrostatic accelerometer or gravitational experiments. This wire introduces a thermal noise limit based on fluctuation-dissipation theory, which depends upon its stiffness and structural loss. In this paper, a simple method for measuring the stiffness and the loss angle of a thin discharging wire is presented by connecting it to a pendulum suspended by a high-quality silica fiber with negligible dissipation. The stiffness and the loss angle of a 10 μm gold wire are measured; the experimental results agree with theoretical estimation. The thermal noise of the pendulum with a thin discharging wire is estimated, and its possible applications in the gravitational experiments are also discussed.
Bai Yan-Zheng
Liu Lin
Luo Jianfeng
Tan D. Y.
Yin Hui
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