Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors

Cumming, A. et al. (2011) Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors. Review of Scientific Instruments, 82(4), 044502. (doi: 10.1063/1.3581228) (PMID:21529026)

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Abstract

Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirrors and their suspensions. Suspension thermal noise results from mechanical dissipation in the fused silica suspension fibers suspending the test mass mirrors and is therefore an important noise source at operating frequencies between ~10 and 30 Hz. This dissipation occurs due to a combination of thermoelastic damping, surface and bulk losses. Its effects can be reduced by optimizing the thermoelastic and surface loss, and these parameters are a function of the cross sectional dimensions of the fiber along its length. This paper presents a new apparatus capable of high resolution measurements of the cross sectional dimensions of suspension fibers of both rectangular and circular cross section, suitable for use in advanced detector mirror suspensions.

Item Type:Articles (Other)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heptonstall, Dr Alastair and Hammond, Professor Giles and Cagnoli, Dr Gianpietro and Cantley, Dr Caroline and Rowan, Professor Sheila and Cumming, Dr Alan and Crooks, Dr David and Hough, Professor James and Strain, Professor Kenneth and Jones, Mr Russell and Barton, Dr Mark
Authors: Cumming, A., Jones, R., Barton, M., Cagnoli, G., Cantley, C. A., Crooks, D. R.M., Hammond, G. D., Heptonstall, A., Hough, J., Rowan, S., and Strain, K. A.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Institute for Gravitational Research
Journal Name:Review of Scientific Instruments
Journal Abbr.:Rev. Sci. Instrum.
Publisher:AIP Publishing
ISSN:0034-6748
ISSN (Online):1089-7623
Published Online:21 April 2011
Copyright Holders:Copyright © 2011 American Institute of Physics
First Published:First published in Review of Scientific Instruments 82(4): 044502
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
459312Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)ST/I001085/1P&A - PHYSICS & ASTRONOMY
337921UK involvement in advanced LIGOKenneth StrainParticle Physics & Astronomy Research Council (PPARC)ST/G504284/1P&A - PHYSICS & ASTRONOMY