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Interferometric sensing of a commercial geophone

Cooper, S. J. and Collins, C. J. and Prokhorov, L. and Warner, J. and Hoyland, D. and Mow-Lowry, C. M. (2022) Interferometric sensing of a commercial geophone. Classical and Quantum Gravity, 39 (7). Art. No. 075023. ISSN 0264-9381. doi:10.1088/1361-6382/ac595c.

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We present a modified commercial L-4C geophone with interferometric readout that demonstrates a resolution 60 times lower than the included coil-magnet readout at low frequencies. The intended application for the modified sensor is in vibration isolation platforms that require improved performance at frequencies lower than 1 Hz. To illustrate it’s application a controls- and noise-model of an Advanced LIGO ‘HAM-ISI’ vibration isolation system was developed, and shows that our sensor can reduce the residual motion of the platforms by a factor of 70 at 0.1 Hz.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Cooper, S. J.0000-0001-8114-3596
Prokhorov, L.0000-0002-0869-185X
Mow-Lowry, C. M.0000-0002-0351-4555
Additional Information:© 2022 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 7 September 2021, revised 28 January 2022; Accepted for publication 28 February 2022; Published 17 March 2022. We thank John Bryant for technical support, Maura Shea and Isaac Davis for integration and testing of the data acquisition systems used in this project. The authors acknowledge the support of the Institute for Gravitational Wave Astronomy at the University of Birmingham, STFC ‘Astrophysics at the University of Birmingham’ Grant ST/S000305/1. Data availability statement: The data that support the findings of this study are available upon reasonable request from the authors.
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)ST/S000305/1
Subject Keywords:interferometry, inertial sensing, homodyne detection
Issue or Number:7
Record Number:CaltechAUTHORS:20220610-571877800
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Official Citation:S J Cooper et al 2022 Class. Quantum Grav. 39 075023
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115122
Deposited By: Tony Diaz
Deposited On:11 Jun 2022 00:23
Last Modified:12 Jul 2022 19:49

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