High quality factor measured in fused silica

Steven D. Penn, Gregory M. Harry, Andri M. Gretarsson, Scott E. Kittelberger, Peter R. Saulson, John J. Schiller, Joshua R. Smith, Sol O. Swords

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


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 strongly dependent on handling, with a pristine flame-polished surface yielding a Q three to four times higher than a surface which had been knocked several times against a copper tube.

Original languageEnglish (US)
Pages (from-to)3670-3673
Number of pages4
JournalReview of Scientific Instruments
Issue number9
StatePublished - Sep 2001

ASJC Scopus subject areas

  • Instrumentation


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