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Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum
In space gravitational wave detection missions, a drag-free system is used to keep the test mass (TM) free-falling in an ultralow-noise environment. Ground verification experiments should be carried out to clarify the shielding and compensating capabilities of the system for multiple stray force noi...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10575363/ https://www.ncbi.nlm.nih.gov/pubmed/37836917 http://dx.doi.org/10.3390/s23198087 |
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author | Wang, Shaoxin Liu, Heshan Dai, Lei Luo, Ziren Xu, Peng Li, Pan Gao, Ruihong Li, Dayu Qi, Keqi |
author_facet | Wang, Shaoxin Liu, Heshan Dai, Lei Luo, Ziren Xu, Peng Li, Pan Gao, Ruihong Li, Dayu Qi, Keqi |
author_sort | Wang, Shaoxin |
collection | PubMed |
description | In space gravitational wave detection missions, a drag-free system is used to keep the test mass (TM) free-falling in an ultralow-noise environment. Ground verification experiments should be carried out to clarify the shielding and compensating capabilities of the system for multiple stray force noises. A hybrid apparatus was designed and analyzed based on the traditional torsion pendulum, and a technique for enhancing the sensitivity of the torsion pendulum system by employing the differential wavefront sensing (DWS) optical readout was proposed. The readout resolution experiment was then carried out on an optical bench that was designed and established. The results indicate that the angular resolution of the DWS signal in optical readout mode can reach the level of 10 nrad/Hz(1/2) over the full measurement band. Compared with the autocollimator, the sensitivity of the torsional pendulum is noticeably improved, and the background noise is expected to reach 4.5 × 10(−15) Nm/Hz(1/2)@10 mHz. This method could also be applied to future upgrades of similar systems. |
format | Online Article Text |
id | pubmed-10575363 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-105753632023-10-14 Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum Wang, Shaoxin Liu, Heshan Dai, Lei Luo, Ziren Xu, Peng Li, Pan Gao, Ruihong Li, Dayu Qi, Keqi Sensors (Basel) Article In space gravitational wave detection missions, a drag-free system is used to keep the test mass (TM) free-falling in an ultralow-noise environment. Ground verification experiments should be carried out to clarify the shielding and compensating capabilities of the system for multiple stray force noises. A hybrid apparatus was designed and analyzed based on the traditional torsion pendulum, and a technique for enhancing the sensitivity of the torsion pendulum system by employing the differential wavefront sensing (DWS) optical readout was proposed. The readout resolution experiment was then carried out on an optical bench that was designed and established. The results indicate that the angular resolution of the DWS signal in optical readout mode can reach the level of 10 nrad/Hz(1/2) over the full measurement band. Compared with the autocollimator, the sensitivity of the torsional pendulum is noticeably improved, and the background noise is expected to reach 4.5 × 10(−15) Nm/Hz(1/2)@10 mHz. This method could also be applied to future upgrades of similar systems. MDPI 2023-09-26 /pmc/articles/PMC10575363/ /pubmed/37836917 http://dx.doi.org/10.3390/s23198087 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Shaoxin Liu, Heshan Dai, Lei Luo, Ziren Xu, Peng Li, Pan Gao, Ruihong Li, Dayu Qi, Keqi Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title | Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title_full | Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title_fullStr | Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title_full_unstemmed | Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title_short | Using DWS Optical Readout to Improve the Sensitivity of Torsion Pendulum |
title_sort | using dws optical readout to improve the sensitivity of torsion pendulum |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10575363/ https://www.ncbi.nlm.nih.gov/pubmed/37836917 http://dx.doi.org/10.3390/s23198087 |
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