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  Reducing tilt-to-length coupling for the LISA test mass interferometer

Tröbs, M., Schuster, S., Lieser, M., Zwetz, M., Chwalla, M., Danzmann, K., 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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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-803B-D Version Permalink: http://hdl.handle.net/21.11116/0000-0002-FA92-F
Genre: Journal Article

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Tröbs, M.1, Author              
Schuster, S.1, Author              
Lieser, M.1, Author
Zwetz, M.1, Author              
Chwalla, M., Author
Danzmann, K.1, Author              
Fernandez Barranco, G.1, Author              
Fitzsimons, E D, Author
Gerberding, O.1, Author              
Heinzel, G.1, Author              
Killow, C. J.1, Author
Perreur-Lloyd, M., Author
Robertson, D. I., Author
Schwarze, T.1, Author              
Wanner, G.1, Author              
Ward, H., Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Physics, Optics, physics.optics
 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 um/rad for interfering beams with relative angles of up to +-300 urad. 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.

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 Dates: 2017-11-232018
 Publication Status: Published in print
 Pages: This work will be submitted to CQG
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 Rev. Method: -
 Identifiers: arXiv: 1711.10320
URI: http://arxiv.org/abs/1711.10320
DOI: 10.1088/1361-6382/aab86c
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Title: Classical and quantum gravity
Source Genre: Journal
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Publ. Info: Bristol, U.K. : Institute of Physics
Pages: - Volume / Issue: 35 (10) Sequence Number: 105001 Start / End Page: - Identifier: ISSN: 0264-9381
CoNE: /journals/resource/954925513480_1