Local active isolation of the AEI-SAS for the AEI 10 m prototype facility

Kirchhoff, R. et al. (2020) Local active isolation of the AEI-SAS for the AEI 10 m prototype facility. Classical and Quantum Gravity, 37(11), 115004. (doi: 10.1088/1361-6382/ab857e)

Abstract

Abstract: High precision measurements in various applications rely on active seismic isolation to decouple the experiment from seismic motion; therefore, closed feed-back control techniques such as sensor blending and sensor correction are commonly implemented. This paper reviews the active isolation techniques of the Albert Einstein Institute seismic attenuation system (AEI-SAS). Two approaches to improve the well known techniques are presented. First, the influence of the sensor basis for the signal-to-noise ratio in the chosen coordinate system is calculated and second, a procedural optimization of blending filters to minimize the optical table velocity is performed. Active isolation techniques are adapted to the mechanical properties and the available sensors and actuators of the AEI-SAS. The performance of the final isolation is presented and limitations to the isolation are analyzed in comparison to a noise model. The optical table motion reaches approximately 8 × 1 0 − 10 m / H z at 1 Hz, reducing the ground motion by a factor of approximately 100.

• Item Type: Articles
• Additional Information: The authors gratefully thank the International Max Planck Research School (IMPRS) on Gravitational Wave Astronomy, QUEST, the Center for Quantum Engineering and Space-Time Research and Quantum Frontiers, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy EXC-2123 QuantumFrontiers 390837967 for their support.
• Keywords: Paper, active seismic isolation, AEI 10 m prototype, gravitational wave detection.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Strain, Professor Kenneth
• Authors: Kirchhoff, R., Mow-Lowry, C. M., Bergmann, G., Hanke, M. M., Koch, P., Köhlenbeck, S. M., Leavey, S., Lehmann, J., Oppermann, P., Wöhler, J., Wu, D. S., Lück, H., and Strain, K.A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Research Centre: College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research
• Journal Name: Classical and Quantum Gravity
• Publisher: IOP Publishing
• ISSN: 1361-6382
• ISSN (Online): 1361-6382
• Copyright Holders: Copyright 0 © 2020 The Author(s)
• First Published: First published in Classical and Quantum Gravity 37(11):115004
• Publisher Policy: Reproduced under a Creative Commons licence