Frequency and surface dependence of the mechanical loss in fused silica
Steven D. Penn, Alexander Ageev, Dan Busby, Gregory M. Harry, Andri M. Gretarsson, Kenji Numata, Phil Willems
Abstract
We have compiled measurements of the mechanical loss in fused silica from samples spanning a wide range of geometries and resonant frequency in order to model the known variation of the loss with frequency and surface-to-volume ratio. This improved understanding of the mechanical loss has contributed significantly to the design of advanced interferometric gravitational wave detectors, which require ultra-low loss materials for their test mass mirrors.
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