Tröbs, M. et al. (2018) Reducing tilt-to-length coupling for the LISA test mass interferometer. Classical and Quantum Gravity, 35(10), 105001. (doi: 10.1088/1361-6382/aab86c)
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Abstract
Objects sensed by laser interferometers are usually not stable in position or orientation. This angular instability can lead to a coupling of angular tilt to apparent longitudinal displacement—tilt-to-length coupling (TTL). In LISA this is a potential noise source for both the test mass interferometer and the long-arm interferometer. We have experimentally investigated TTL coupling in a setup representative for the LISA test mass interferometer and used this system to characterise two different imaging systems (a two-lens design and a four-lens design) both designed to minimise TTL coupling. We show that both imaging systems meet the LISA requirement of ±25 μm rad−1 for interfering beams with relative angles of up to ±300 μrad. Furthermore, we found a dependency of the TTL coupling on beam properties such as the waist size and location, which we characterised both theoretically and experimentally.
Item Type: | Articles |
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Keywords: | Gravitational waves, LISA, interferometer. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Perreur-Lloyd, Mr Michael and Killow, Dr Christian and Ward, Professor Henry and Robertson, Dr David |
Authors: | Tröbs, M., Schuster, S., Lieser, M., Zwetz, M., Chwalla, M., Danzmann, K., Barránco, G. F., Fitzsimons, E. D., Gerberding, O., Heinzel, G., Killow, C. J., Perreur-Lloyd, M., Robertson, D. I., Schwarze, T. S., Wanner, G., and Ward, H. |
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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 |
Research Group: | Institute for Gravitational Research |
Journal Name: | Classical and Quantum Gravity |
Publisher: | IOP Publishing |
ISSN: | 0264-9381 |
ISSN (Online): | 1361-6382 |
Published Online: | 09 April 2018 |
Copyright Holders: | Copyright © 2018 IOP Publishing Ltd |
First Published: | First published in Classical and Quantum Gravity 35(10): 105001 |
Publisher Policy: | Reproduced under a Creative Commons License |
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