Update on quadruple suspension design for advanced LIGO

Aston, S. M. and Cantley, C. A., LIGO Scientific Collaboration (2012) Update on quadruple suspension design for advanced LIGO. Classical and Quantum Gravity, 29 (23). 235004. ISSN 1361-6382 (https://doi.org/10.1088/0264-9381/29/23/235004)

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Abstract

We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-Wave Observatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.

  • Item type:Article
    ID code:50744
    Dates:
    Date
    Event
    7 December 2012
    Published
    22 October 2012
    Published Online
    Notes:S M Aston et al 2012 Class. Quantum Grav. 29 235004. ©2012 IOP Publishing Ltd
    Subjects:Science > Astronomy
    Science > Physics
    Department:Faculty of Science > Physics
    Faculty of Engineering
    Depositing user: Pure Administrator
    Date deposited:10 Dec 2014 11:36
    Last modified:11 Nov 2024 10:53
    URI:https://strathprints.strath.ac.uk/id/eprint/50744
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