A six degree-of-freedom fused silica seismometer: design and tests of a metal prototype

Amit Singh Ubhi; Jiri Smetana; Teng Zhang; Sam Cooper; Leonid Prokhorov; John Bryant; David Hoyland; Haixing Miao; Denis Martynov

doi:10.1088/1361-6382/ac39b9

A six degree-of-freedom fused silica seismometer: design and tests of a metal prototype

Amit Singh Ubhi, Jiri Smetana, Teng Zhang, Sam Cooper, Leonid Prokhorov, John Bryant, David Hoyland, Haixing Miao, Denis Martynov

Physics and Astronomy

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Abstract

Ground vibrations couple to the longitudinal and angular motion of the aLIGO test masses and limit the observatory sensitivity below 30 Hz. Novel inertial sensors have the potential to improve the aLIGO sensitivity in this band and simplify the lock acquisition of the detectors. In this paper, we experimentally study a compact 6D seismometer that consists of a mass suspended by a single wire. The position of the mass is interferometrically read out relative to the platform that supports the seismometer. We present the experimental results, discuss limitations of our metallic prototype, and show that a compact 6D seismometer made out of fused silica and suspended with a fused silica fibre has the potential to improve the aLIGO low frequency noise.

Original language	English
Article number	015006
Journal	Classical and Quantum Gravity
Volume	39
Issue number	1
Early online date	6 Dec 2021
DOIs	https://doi.org/10.1088/1361-6382/ac39b9
Publication status	Published - 6 Jan 2022

Keywords

controls
feedback
interferometric
seismic isolation
seismometers
suspensions

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10.1088/1361-6382/ac39b9Licence: Creative Commons: Attribution (CC BY)

Ubhi_2022_Class._Quantum_Grav._39_015006Final published version, 2.74 MBLicence: Creative Commons: Attribution (CC BY)

https://iopscience.iop.org/article/10.1088/1361-6382/ac39b9

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
Gravitational Wave Astronomy at the University of Birmingham, STFC Equipment Call 2018
Miao, H. (Co-Investigator), Martynov, D. (Principal Investigator), Vecchio, A. (Co-Investigator), Mow-Lowry, C. (Co-Investigator) & Freise, A. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/18 → 30/06/19
Project: Research Councils

Cite this

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abstract = "Ground vibrations couple to the longitudinal and angular motion of the aLIGO test masses and limit the observatory sensitivity below 30 Hz. Novel inertial sensors have the potential to improve the aLIGO sensitivity in this band and simplify the lock acquisition of the detectors. In this paper, we experimentally study a compact 6D seismometer that consists of a mass suspended by a single wire. The position of the mass is interferometrically read out relative to the platform that supports the seismometer. We present the experimental results, discuss limitations of our metallic prototype, and show that a compact 6D seismometer made out of fused silica and suspended with a fused silica fibre has the potential to improve the aLIGO low frequency noise.",

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AU - Prokhorov, Leonid

AU - Bryant, John

AU - Hoyland, David

AU - Miao, Haixing

AU - Martynov, Denis

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AB - Ground vibrations couple to the longitudinal and angular motion of the aLIGO test masses and limit the observatory sensitivity below 30 Hz. Novel inertial sensors have the potential to improve the aLIGO sensitivity in this band and simplify the lock acquisition of the detectors. In this paper, we experimentally study a compact 6D seismometer that consists of a mass suspended by a single wire. The position of the mass is interferometrically read out relative to the platform that supports the seismometer. We present the experimental results, discuss limitations of our metallic prototype, and show that a compact 6D seismometer made out of fused silica and suspended with a fused silica fibre has the potential to improve the aLIGO low frequency noise.

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A six degree-of-freedom fused silica seismometer: design and tests of a metal prototype

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Keywords

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Astrophysics at the University of Birmingham

Gravitational Wave Astronomy at the University of Birmingham, STFC Equipment Call 2018

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