Large-scale monolithic fused-silica mirror suspension for third-generation gravitational-wave detectors

Cumming, A. V. , Jones, R., Hammond, G. D. , Hough, J. , Martin, I. W. and Rowan, S. (2022) Large-scale monolithic fused-silica mirror suspension for third-generation gravitational-wave detectors. Physical Review Applied, 17(2), 024044. (doi: 10.1103/PhysRevApplied.17.024044)

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Abstract

Thermal noise from the suspension fibers used in the mirror pendulums in current gravitational-wave detectors is a critical noise source. Future detectors will require improved suspension performance with the specific ability to suspend much heavier masses to reduce radiation pressure noise, while retaining good thermal noise performance. In this paper we propose and experimentally demonstrate a design for a large-scale fused-silica suspension, demonstrating its suitability for holding an increased mass of 160 kg. We demonstrate the concepts for improving thermal noise via longer suspension fibers supporting a higher static stress. We present a full thermal noise analysis of our prototype, meeting requirements for conceptual third-generation detector designs such as the high frequency interferometer of the Einstein Telescope, and closely approaching that required for Cosmic Explorer.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cumming, Dr Alan and Rowan, Professor Sheila and Martin, Dr Iain and Jones, Mr Russell and Hammond, Professor Giles and Hough, Professor James
Authors: Cumming, A. V., Jones, R., Hammond, G. D., Hough, J., Martin, I. W., and Rowan, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Applied
Publisher:American Physical Society
ISSN:2331-7019
ISSN (Online):2331-7019
Copyright Holders:Copyright © 2022 American Physical Society
First Published:First published in Physical Review Applied 17(2): 024044
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
173808Investigations in gravitational radiationSheila RowanScience and Technology Facilities Council (STFC)ST/N005422/1P&S - Physics & Astronomy
310743Investigations in Gravitational Radiation: 1-year extensionSheila RowanScience and Technology Facilities Council (STFC)ST/V001736/1P&S - Physics & Astronomy