High quality factor measured in fused silica

  title={High quality factor measured in fused silica},
  author={Steven D. Penn and Gregory M. Harry and Andri M. Gretarsson and Scott Erich Kittelberger and Peter Saulson and John J. Schiller and Joshua R. Smith and Sol Swords},
  journal={Review of Scientific Instruments},
We have measured the mechanical dissipation in a sample of fused silica drawn into a rod. The sample was hung from a multiple-bob suspension, which isolated it from rubbing against its support, from recoil in the support structure, and from seismic noise. The quality factor, Q, was measured for several modes with a high value of 57.1±0.1 million found for the mode number 2 at 726 Hz. This result is about a factor of 2 higher than previous room temperature measurements. The measured Q was… 

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