Thin walled Nb tubes for suspending test masses in interferometric gravitational wave detectors

B.H. Lee, Li Ju, David Blair

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    In a previous Letter, we have shown that the use of orthogonal ribbons could provide a better mirror suspension technique in interferometric gravitational wave antennas. One of the key improvements presented by the orthogonal ribbon is the reduction in the number of violin string modes in the direction of the laser. We have considered more elaborate geometries in recent simulations and obtained a suspension that provides further reduction in the number of violin string modes in the direction of the laser, as well as in the direction orthogonal to the laser. This thin walled niobium tube suspension exhibits a reduction in the number of violin modes to 5 in each direction up to a frequency of 5 kHz. Furthermore, the violin mode thermal noise peaks can be reduced in amplitude by 30 dB. (c) 2005 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)319-323
    JournalPhysics Letters A
    Volume350
    Issue number5-6
    DOIs
    Publication statusPublished - 2006

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