Comparison of parametric instabilities for different test mass materials in advanced gravitational wave interferometers

Li Ju, Chunnong Zhao, Slawomir Gras, Jerome Degallaix, David Blair, J. Munch, D.H. Reitze

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)

    Abstract

    Following the recognition that parametric instabilities can significantly compromise the performance of advanced laser interferometer gravitational wave detectors, we compare the performance of three different test mass configurations: all fused silica test masses, all sapphire test masses and fused silica inboard test masses with sapphire end test masses. We show that the configuration with sapphire end test masses offers the opportunity for thermal tuning on a time scale comparable to the ring up time of oscillatory instabilities. This approach may enable significant reduction of parametric gain. (c) 2006 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)419-426
    JournalPhysics Letters A
    Volume355
    Issue number6
    DOIs
    Publication statusPublished - 2006

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