A study on motion reduction for suspended platforms used in gravitational wave detectors

authored by: Sina M. Koehlenbeck, Conor M. Mow-Lowry, Gerald Bergmann, Robin Kirchoff, Philip Koch, Gerrit Kühn, Johannes Lehmann, Patrick Oppermann, Janis Wöhler, David S. Wu
Abstract: We report a reduction in motion for suspended seismic-isolation platforms in a gravitational wave detector prototype facility. We sense the distance between two seismic-isolation platforms with a suspension platform interferometer and the angular motion with two optical levers. Feedback control loops reduce the length changes between two platforms separated by 11.65m to 10pmHz-1/2 at 100mHz, and the angular motion of each platform is reduced to 1nradHz-1/2 at 100mHz. As a result, the length fluctuations in a suspended optical resonator on top of the platforms is reduced by three orders of magnitude. This result is of direct relevance to gravitational wave detectors that use similar suspended optics and seismic isolation platforms.
Organisation(s): Institute of Gravitation Physics
QuantumFrontiers
External Organisation(s): Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Vrije Universiteit
Fritz Haber Institute of the Max Planck Society (FHI)
Type: Article
Journal: Scientific reports
Volume: 13
ISSN: 2045-2322
Publication date: 10.02.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General
Electronic version(s): https://doi.org/10.1038/s41598-023-29418-x (Access: Open)

BibTeX

@article{4edcfa2fe990496dafee605656138882,
title = "A study on motion reduction for suspended platforms used in gravitational wave detectors",
abstract = "We report a reduction in motion for suspended seismic-isolation platforms in a gravitational wave detector prototype facility. We sense the distance between two seismic-isolation platforms with a suspension platform interferometer and the angular motion with two optical levers. Feedback control loops reduce the length changes between two platforms separated by 11.65m to 10pmHz-1/2 at 100mHz, and the angular motion of each platform is reduced to 1nradHz-1/2 at 100mHz. As a result, the length fluctuations in a suspended optical resonator on top of the platforms is reduced by three orders of magnitude. This result is of direct relevance to gravitational wave detectors that use similar suspended optics and seismic isolation platforms.",
author = "Koehlenbeck, {Sina M.} and Mow-Lowry, {Conor M.} and Gerald Bergmann and Robin Kirchoff and Philip Koch and Gerrit K{\"u}hn and Johannes Lehmann and Patrick Oppermann and Janis W{\"o}hler and Wu, {David S.}",
note = "Funding Information: The authors wish to thank Brian T. Lantz, Prof. Kenneth A. Strain, Harald L{\"u}ck, and Prof. Karsten Danzmann for their continuing support. The authors acknowledge support from the International Max Planck Research School (IMPRS) on Gravitational Wave Astronomy and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967. ",
year = "2023",
month = feb,
day = "10",
doi = "10.1038/s41598-023-29418-x",
language = "English",
volume = "13",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",
}