Brownian motion of a torsion pendulum with internal friction

Gabriela I. González, Peter R. Saulson

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


We constructed a torsion pendulum in which the dissipation is dominated by internal friction in the fiber. We compare the measured thermal noise spectrum with the prediction from the fluctuation-dissipation theorem. The agreement is excellent. The spectrum exhibits an approximately 1 f slope below resonance. We discuss the implications for interferometric gravitational wave detectors.

Original languageEnglish (US)
Pages (from-to)12-18
Number of pages7
JournalPhysics Letters A
Issue number1
StatePublished - May 15 1995

ASJC Scopus subject areas

  • General Physics and Astronomy


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