Sensitivity and control of a 6-axis fused-silica seismometer
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915091290521600 |
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| author | Smetana, Jiri Ubhi, Amit Singh Chick, Emilia Prokhorov, Leonid Bryant, John Dmitriev, Artemiy Gill, Alex Koponen, Lari Miao, Haixing Cumming, Alan V. Hammond, Giles Frolov, Valery Mittleman, Richard Fritchel, Peter Martynov, Denis |
| author_facet | Smetana, Jiri Ubhi, Amit Singh Chick, Emilia Prokhorov, Leonid Bryant, John Dmitriev, Artemiy Gill, Alex Koponen, Lari Miao, Haixing Cumming, Alan V. Hammond, Giles Frolov, Valery Mittleman, Richard Fritchel, Peter Martynov, Denis |
| contents | We present a pair of seismometers capable of measurement in all six axes of rigid motion. The vacuum-compatible devices implement compact interferometric displacement sensors to surpass the sensitivity of typical electrical readout schemes. Together with the capability to subtract the sensitivity-limiting coupling of ground tilt into horizontal motion, our seismometers can widen the sensing band towards mHz frequencies. This has notable applications across a range of fields requiring access to low-frequency signals, such as seismology and climate research. We particularly highlight their potential application in gravitational-wave observatories (LIGO) in improving their observation capability of intermediate-mass black holes ($\sim 1000\,M_\odot$). The sensors are based on a near-monolithic fused-silica design consisting of a fused-silica mass and fibre, showing improved stability and robustness to tilt drifts, alignment, and control compared to all-metal or mixed metal-silica designs. We demonstrate tilt sensitivity that surpasses the best commercial alternatives in a significantly reduced footprint compared to our previous iterations of these sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_13475 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sensitivity and control of a 6-axis fused-silica seismometer Smetana, Jiri Ubhi, Amit Singh Chick, Emilia Prokhorov, Leonid Bryant, John Dmitriev, Artemiy Gill, Alex Koponen, Lari Miao, Haixing Cumming, Alan V. Hammond, Giles Frolov, Valery Mittleman, Richard Fritchel, Peter Martynov, Denis Instrumentation and Detectors Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology We present a pair of seismometers capable of measurement in all six axes of rigid motion. The vacuum-compatible devices implement compact interferometric displacement sensors to surpass the sensitivity of typical electrical readout schemes. Together with the capability to subtract the sensitivity-limiting coupling of ground tilt into horizontal motion, our seismometers can widen the sensing band towards mHz frequencies. This has notable applications across a range of fields requiring access to low-frequency signals, such as seismology and climate research. We particularly highlight their potential application in gravitational-wave observatories (LIGO) in improving their observation capability of intermediate-mass black holes ($\sim 1000\,M_\odot$). The sensors are based on a near-monolithic fused-silica design consisting of a fused-silica mass and fibre, showing improved stability and robustness to tilt drifts, alignment, and control compared to all-metal or mixed metal-silica designs. We demonstrate tilt sensitivity that surpasses the best commercial alternatives in a significantly reduced footprint compared to our previous iterations of these sensors. |
| title | Sensitivity and control of a 6-axis fused-silica seismometer |
| topic | Instrumentation and Detectors Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2405.13475 |