Coated Fused Silica Fibers for Enhanced Sensitivity Torsion Pendulum

Details Coated Fused Silica Fibers for Enhanced Sensitivity Torsion Pendulum Coated Fused Silica Fibers for Enhanced Sensitivity Torsion Pendulum

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7418n&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #74.18; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

To investigate the fundamental thermal noise limit of a torsion pendulum using a fused silica fiber, we systematically measured and modeled the mechanical losses of thin fused silica fibers, coated by thin metal film to obtain electrical conductivity. Our results indicate that it is possible to achieve a thermal noise limit lower by a factor of between 3 and 10, depending on the silica diameter, compared to the best tungsten fibers available. This will allow a corresponding increase in sensitivity of torsion pendulum used for weak force measurements, including the gravitational constant measurement and ground-based force noise testing for LISA mission.

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