Strategies for the control of parametric instability in advanced gravitational wave detectors

Details Strategies for the control of parametric instability in advanced gravitational wave detectors Strategies for the control of parametric instability in advanced gravitational wave detectors

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cqgra..26a5002j&link_type=abstract

Classical and Quantum Gravity, Volume 26, Issue 1, pp. 015002 (2009).

Physics

5

Scientific paper

Parametric instabilities have been predicted to occur in all advanced high optical power gravitational wave detectors. In this paper we review the problem of parametric instabilities, summarize the latest findings and assess various schemes proposed for their control. We show that non-resonant passive damping of test masses reduces parametric instability but has a noise penalty, and fails to suppress the Q-factor of many modes. Resonant passive damping is shown to have significant advantages but requires detailed modeling. An optical feedback mode suppression interferometer is proposed which is capable of suppressing all instabilities but requires experimental development.

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