Effects of electrical charging on the mechanical Q of a fused silica disk
Michael J. Mortonson, Christophoros C. Vassiliou, David J. Ottaway, David H. Shoemaker, Gregory M. Harry
Abstract
We report on the effects of an electrical charge on mechanical loss of a fused silica disk. A degradation of Q was seen that correlated with charge on the surface of the sample. We examine a number of models for charge damping, including eddy current damping and loss due to polarization. We conclude that rubbing friction between the sample and a piece of dust attracted by the charged sample is the most likely explanation for the observed loss.
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