High quality factor measured in fused silica
Abstract
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.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- September 2001
- DOI:
- 10.1063/1.1394183
- arXiv:
- arXiv:gr-qc/0009035
- Bibcode:
- 2001RScI...72.3670P
- Keywords:
-
- 62.40.+i;
- 42.70.Ce;
- 04.80.Nn;
- 07.60.Ly;
- Anelasticity internal friction stress relaxation and mechanical resonances;
- Glasses quartz;
- Gravitational wave detectors and experiments;
- Interferometers;
- General Relativity and Quantum Cosmology
- E-Print:
- Preprint - Under review by LSC publications committee