Resonance widening in spherical GW detectors: model descriptions of the dissipation processes

Details Resonance widening in spherical GW detectors: model descriptions of the dissipation processes Resonance widening in spherical GW detectors: model descriptions of the dissipation processes

2002-10-28

arxiv.org/abs/gr-qc/0210093v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 4 EPS figures, LaTeX2e (needs IOP macros), submitted to Classical and Quantum Gravity

Scientific paper

Internal friction effects are responsible for line widening of the resonance frequencies in mechanical oscillators and result in damped oscillations of its eigenmodes with a decay time Q/\omega. We study the solutions to the equations of motion for the case of spherical oscillators, to be used as next generation of acoustic gravitational wave detectors, based on various different assumptions about the material's constituent equations. Quality factor dependence on mode frequency is determined in each case, and a discussion of its applicability to actual gravitational wave detectors is made on the basis of available experimental evidence.

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