Effect of heat treatment and aging on the mechanical loss and strength of hydroxide catalysis bonds between fused silica samples

Haughian, K., van Veggel, A.A. , Cunningham, L. , Hough, J. , Murray, P.G., Reid, S. and Rowan, S. (2017) Effect of heat treatment and aging on the mechanical loss and strength of hydroxide catalysis bonds between fused silica samples. Physical Review D, 96(4), 042003. (doi:10.1103/PhysRevD.96.042003)

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Abstract

Hydroxide catalysis bonds are used in the aLIGO gravitational wave detectors and are an essential technology within the mirror suspensions which allowed for detector sensitivities to be reached that enabled the first direct detections of gravitational waves. Methods aimed at further improving hydroxide catalysis bonds for future upgrades to these detectors, in order to increase detection rates and the number of detectable sources, are explored. Also, the effect on the bonds of an aLIGO suspension construction procedure involving heat, the fibre welding process, is investigated. Here we show that thermal treatments can be beneficial to improving some of the bond properties important to the mirror suspensions in interferometric gravitational wave detectors. It was found that heat treating bonds at 150\,^\circC increases bond strength by a factor of approximately 1.5 and a combination of bond ageing and heat treatment of the optics at 150\,\circC reduces the mechanical loss of a bond from 0.10 to 0.05. It is also shown that current construction procedures do not reduce bond strength.

Item Type:Articles
Additional Information:Also acknowledges Royal Society award RG1200367.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Reid, Professor Stuart and van Veggel, Dr Marielle and Rowan, Professor Sheila and Cunningham, Dr Liam and Hough, Professor James and Haughian, Dr Karen and Murray, Dr Peter
Authors: Haughian, K., van Veggel, A.A., Cunningham, L., Hough, J., Murray, P.G., Reid, S., 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
Copyright Holders:Copyright © 2017 American Physical Society
First Published:First published in Physical Review D 96(4): 042003
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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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
599861Underexplored properties of hydroxide catalysis bondsAnna-Maria Van VeggelThe Royal Society (ROYSOC)DH120021S&E P&A - PHYSICS & ASTRONOMY
621211Delivering hydroxide catalysis bonding with impactAnna-Maria Van VeggelThe Royal Society (ROYSOC)RG120367S&E P&A - PHYSICS & ASTRONOMY