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)