Thermal noise in mechanical experiments

Research output: Contribution to journalArticle

546 Citations (Scopus)

Abstract

The fluctuation-dissipation theorem is applied to the case of low-dissipation mechanical oscillators, whose losses are dominated by processes occurring inside the material of which the oscillators are made. In the common case of losses described by a complex spring constant with a constant imaginary part, the thermal noise displacement power spectrum is steeper by one power of than is predicted by a velocity-damping model. I construct models for the thermal noise spectra of systems with more than one mode of vibration, and evaluate a model of a specific design of pendulum suspension for the test masses in a gravitational-wave interferometer.

Original languageEnglish (US)
Pages (from-to)2437-2445
Number of pages9
JournalPhysical Review D
Volume42
Issue number8
DOIs
StatePublished - 1990

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thermal noise
dissipation
mechanical oscillators
pendulums
noise spectra
gravitational waves
power spectra
vibration mode
interferometers
theorems
damping
oscillators

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Thermal noise in mechanical experiments. / Saulson, Peter R.

In: Physical Review D, Vol. 42, No. 8, 1990, p. 2437-2445.

Research output: Contribution to journalArticle

Saulson, Peter R. / Thermal noise in mechanical experiments. In: Physical Review D. 1990 ; Vol. 42, No. 8. pp. 2437-2445.
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