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arXiv · 2109.03147

Interferometric sensing of a commercial geophone

S. J. Cooper·C. J. Collins·L. Prokhorov·J. Warner·D. Hoyland·C. M. Mow-Lowry
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Abstract

We present a modified commercial L-4C geophone with interferometric readout that demonstrated 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. A controls and noise-model of an Advanced LIGO 'HAM-ISI' vibration isolation system was developed, and it shows that our sensor can reduce the residual vibration by a factor of 70 at 0.1 Hz

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S. J. Cooper, C. J. Collins, L. Prokhorov, J. Warner, D. Hoyland, C. M. Mow-Lowry. 2021-09-07. Interferometric sensing of a commercial geophone. https://doi.org/10.1088/1361-6382%2Fac595c

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