Interferometric sensing of a commercial geophone

S J Cooper; C J Collins; L Prokhorov; J Warner; D Hoyland; C M Mow-lowry

doi:10.1088/1361-6382/ac595c

Interferometric sensing of a commercial geophone

S J Cooper, C J Collins, L Prokhorov, J Warner, D Hoyland, C M Mow-lowry

Physics and Astronomy

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Abstract

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.

Original language	English
Article number	075023
Journal	Classical and Quantum Gravity
Volume	39
Issue number	7
Early online date	17 Mar 2022
DOIs	https://doi.org/10.1088/1361-6382/ac595c
Publication status	Published - 7 Apr 2022

Keywords

homodyne detection
inertial sensing
interferometry

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10.1088/1361-6382/ac595cLicence: Creative Commons: Attribution (CC BY)

Cooper_2022_Class._Quantum_Grav._39_075023Final published version, 2.15 MBLicence: Creative Commons: Attribution (CC BY)

https://iopscience.iop.org/article/10.1088/1361-6382/ac595c

Astrophysics at the University of Birmingham
Speake, C. (Co-Investigator), Martynov, D. (Co-Investigator), Stevens, I. (Co-Investigator), Mow-Lowry, C. (Co-Investigator), Vecchio, A. (Principal Investigator), Smith, G. (Co-Investigator), McGee, S. (Co-Investigator), Freise, A. (Co-Investigator), Miao, H. (Co-Investigator), Gough, R. (Co-Investigator) & Windridge, D. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/19 → 31/03/23
Project: Research

Cite this

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abstract = "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.",

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AU - Collins, C J

AU - Prokhorov, L

AU - Warner, J

AU - Hoyland, D

AU - Mow-lowry, C M

PY - 2022/4/7

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KW - interferometry

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JO - Classical and Quantum Gravity

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Interferometric sensing of a commercial geophone

Abstract

Keywords

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Astrophysics at the University of Birmingham

Cite this