Tilt-to-length coupling in LISA Pathfinder: Analytical modeling

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dc.identifier.uri http://dx.doi.org/10.15488/15369
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/15489
dc.contributor.author Hartig, Marie-Sophie
dc.contributor.author Wanner, Gudrun
dc.date.accessioned 2023-11-20T07:06:51Z
dc.date.available 2023-11-20T07:06:51Z
dc.date.issued 2023
dc.identifier.citation Hartig, M.-S.; Wanner, G.: Tilt-to-length coupling in LISA Pathfinder: Analytical modeling. In: Physical Review D 108 (2023), Nr. 2, 022008. DOI: https://doi.org/10.1103/physrevd.108.022008
dc.description.abstract Tilt-to-length coupling was the limiting noise source in LISA Pathfinder between 20 and 200 mHz before subtraction in postprocessing. To prevent the adding of sensing noise to the data by the subtraction process, the success of this strategy depended on a previous direct noise reduction by test mass alignment. The exact dependency of the level of tilt-to-length coupling on the set points of LISA Pathfinder's test masses was not understood until the end of the mission. Here, we present, for the first time, an analytical tilt-to-length coupling model that describes the coupling noise changes due to the realignments. We report on the different mechanisms, namely the lever arm and piston effect as well as the coupling due to transmissive components, and how they contribute to the full coupling. Further, we show that a pure geometric model would not have been sufficient to describe the coupling in LISA Pathfinder. Therefore, we model also the nongeometric tilt-to-length noise contributions. For the resulting coupling coefficients of the full model, we compute the expected error bars based on the known individual error sources. Also, we validated the analytical model against numerical simulations. A detailed study and thorough understanding of this noise are the basis for a successful analysis of the LISA Pathfinder data with respect to tilt-to-length coupling. eng
dc.language.iso eng
dc.publisher Ridge, NY : American Physical Society
dc.relation.ispartofseries Physical Review D 108 (2023), Nr. 2
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0
dc.subject.ddc 530 | Physik
dc.title Tilt-to-length coupling in LISA Pathfinder: Analytical modeling eng
dc.type Article
dc.type Text
dc.relation.essn 2470-0029
dc.relation.issn 2470-0010
dc.relation.doi https://doi.org/10.1103/physrevd.108.022008
dc.bibliographicCitation.issue 2
dc.bibliographicCitation.volume 108
dc.bibliographicCitation.firstPage 022008
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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