Silicon mirror suspensions for gravitational wave detectors

Cumming, A.V. et al. (2013) Silicon mirror suspensions for gravitational wave detectors. Classical and Quantum Gravity, 31(2), 025017. (doi: 10.1088/0264-9381/31/2/025017)

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One of the most significant limits to the sensitivity of current, and future, long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test masses and their suspensions. This paper reports results of analytical and experimental studies of the limits to thermal noise performance of cryogenic silicon test mass suspensions set by two constraints on suspension fibre dimensions: the minimum dimensions required to allow conductive cooling for extracting incident laser beam heat deposited in the mirrors; and the minimum dimensions of fibres (set by their tensile strength) which can support test masses of the size envisaged for use in future detectors. We report experimental studies of breaking strength of silicon ribbons, and resulting design implications for the feasibility of suspension designs for future gravitational wave detectors using silicon suspension fibres. We analyse the implication of this study for thermal noise performance of cryogenically cooled silicon suspensions.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Nawrodt, Dr Ronny and Hammond, Professor Giles and van Veggel, Dr Marielle and Rowan, Professor Sheila and Martin, Dr Iain and Cumming, Dr Alan and Cunningham, Dr Liam and Hough, Professor James and Haughian, Dr Karen
Authors: Cumming, A.V., Cunningham, L., Hammond, G., Haughian, K., Hough, J., Kroker, S., Martin, I.W., Nawrodt, R., Rowan, S., Schwarz, C., and van Veggel, A.A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics Publishing Ltd.
ISSN (Online):1361-6382
Copyright Holders:Copyright © 2014 IOP Publishing Ltd.
First Published:First published in Classical and Quantum Gravity 31(2):025017
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
459313Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)ST/J000361/1P&A - PHYSICS & ASTRONOMY
459311Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)PP/F001118/1P&A - PHYSICS & ASTRONOMY
624341Investigations in Gravitational RadiationSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY