Measurements of the Young’s modulus of hydroxide catalysis bonds, and the effect on thermal noise in ground-based gravitational wave detectors

Phelps, M., van Veggel, A.-M. , Hough, J. , Messenger, C. , Hughes, D., Cunningham, W. , Haughian, K. and Rowan, S. (2018) Measurements of the Young’s modulus of hydroxide catalysis bonds, and the effect on thermal noise in ground-based gravitational wave detectors. Physical Review D, 97(10), 102004. (doi:10.1103/PhysRevD.97.102004)

Phelps, M., van Veggel, A.-M. , Hough, J. , Messenger, C. , Hughes, D., Cunningham, W. , Haughian, K. and Rowan, S. (2018) Measurements of the Young’s modulus of hydroxide catalysis bonds, and the effect on thermal noise in ground-based gravitational wave detectors. Physical Review D, 97(10), 102004. (doi:10.1103/PhysRevD.97.102004)

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Abstract

With the outstanding results from the detection and observation of gravitational waves from coalescing black holes and neutron star inspirals, it is essential that pathways to further improve the sensitivities of the LIGO and VIRGO detectors are explored. There are a number of factors that potentially limit the sensitivities of the detectors. One such factor is thermal noise, a component of which results from the mechanical loss in the bond material between the silica fibre suspensions and the test mass mirrors. To calculate its magnitude, the Young’s modulus of the bond material has to be known with reasonable accuracy. In this paper we present a new combination of ultrasonic technology and Bayesian analysis to measure the Young’s modulus of hydroxide catalysis bonds between fused silica substrates. Using this novel technique, we measure the bond Young’s modulus to be 18.5 ± 2.0 2.3     GPa . We show that by applying this value to thermal noise models of bonded test masses with suitable attachment geometries, a reduction in suspension thermal noise consistent with an overall design sensitivity improvement allows a factor of 5 increase in event rate to be achieved.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Messenger, Dr Christopher and Phelps, Margot H and van Veggel, Dr Anna-Maria and Rowan, Professor Sheila and Cunningham, Dr William and Hough, Professor James and Haughian, Dr Karen
Authors: Phelps, M., van Veggel, A.-M., Hough, J., Messenger, C., Hughes, D., Cunningham, W., Haughian, K., and Rowan, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1550-2368
Published Online:11 May 2018
Copyright Holders:Copyright © 2018 American Physical Society
First Published:First published in Physical Review D 97(10): 102004
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 & Technology Facilities Council (STFC)ST/I001085/1P&A - PHYSICS & ASTRONOMY
459313Investigations in Gravitational Radiation.Sheila RowanScience & Technology Facilities Council (STFC)ST/J000361/1P&A - PHYSICS & ASTRONOMY
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technology Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY
713721Investigations in gravitational radiationSheila RowanScience & Technology Facilities Council (STFC)ST/N005422/1S&E P&A - PHYSICS & ASTRONOMY