Tilt-to-length coupling in LISA Pathfinder: Long-term stability

The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular time spans. In this work, we investigate the long-term stability of the coupling coefficients of this noise. We show that they drifted slowly (by <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>μm</a:mi><a:mo>/</a:mo><a:mi>rad</a:mi></a:mrow></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>6</c:mn><c:mo>×</c:mo><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>6</c:mn></c:mrow></c:msup></c:math> in 100 days) and were strongly correlated to temperature changes within the satellite (<e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mrow><e:mn>8</e:mn><e:mtext> </e:mtext><e:mtext> </e:mtext><e:mi>μm</e:mi><e:mo>/</e:mo><e:mi>rad</e:mi><e:mo>/</e:mo><e:mi mathvariant="normal">K</e:mi></e:mrow></e:math> and <h:math xmlns:h="http://www.w3.org/1998/Math/MathML" display="inline"><h:mrow><h:mn>30</h:mn><h:mo>×</h:mo><h:msup><h:mrow><h:mn>10</h:mn></h:mrow><h:mrow><h:mo>−</h:mo><h:mn>6</h:mn></h:mrow></h:msup><h:mo>/</h:mo><h:mi mathvariant="normal">K</h:mi></h:mrow></h:math>). Based on analytical tilt-to-length coupling models, we attribute the temperature-driven coupling changes to rotations of the test masses and small distortions in the optical setup. Particularly, our findings lead to the conclusion that LISA Pathfinder’s optical baseplate was bent during the cooldown experiment, which started in late 2016 and lasted several months. Published by the American Physical Society 2024

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Journal
Physical review. D/Physical review. D.
Published
2024-09-03
DOI
https://doi.org/10.1103/physrevd.110.063005
Citations
4
Primary Topic
Pulsars and Gravitational Waves Research
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article
Field-Weighted Citation Impact
0.99

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article

Tilt-to-length coupling in LISA Pathfinder: Long-term stability

Gerhard Heinzel, Carlos F. Sopuerta, D. Vetrugno, L. Martin-Polo et al.
4 citations
Physical review. D/Physical review. D.
Pulsars and Gravitational Waves Research
0.99
article

Tilt-to-length coupling in LISA Pathfinder: Long-term stability

Gerhard Heinzel, Carlos F. Sopuerta, D. Vetrugno, L. Martin-Polo, M. Born, F. Gibert, I. Harrison, D. Hollington, James Ira Thorpe, N. Meshksar, A. Cavalleri, S. Paczkowski, O. Jennrich, H. Audley, R. L. Ward, Gudrun Wanner, G. Russano, I. Diepholz, M. Freschi, R. Dolesi, D. Bortoluzzi, Domenico Giardini, J. Martino, M. Nofrarías, J. Slutsky, L. Gesa, J. P. López-Zaragoza, H. Inchauspé, F. Rivas, Jose Sanjuán, R. Giusteri, C. Grimani, L. Ferraioli, Pierre Binétruy, D. I. Robertson, B. Kaune, J. Grzymisch, F. Martín-Porqueras, J. A. Lobo, M. de Deus Silva, C. J. Killow, V. Ferroni, Natalia Korsakova, A. M. Cruise, George Dixon, J. Ramos-Castro, José F. G. Mendes, Peter Wass, P. W. McNamara, A. Wittchen, Marie-Sophie Hartig, L. Wissel, Nikolaos Karnesis, J. Baird, S. Vitale, E. Castelli, B. Johlander, M. Hewitson, A. Cesarini, M. Perreur-Lloyd, T. J. Sumner, P. Zweifel, W. J. Weber, D. Hoyland, L. Mendes, P. Jetzer, M. Hueller, M. Armano, D. Mance, D. Texier, K. Danzmann, E. D. Fitzsimons, E. Plagnol, Ulrich Johann, R. Maarschalkerweerd, J. Reiche, A. Petiteau, V. Martín
article en
4 citations

Abstract

The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular time spans. In this work, we investigate the long-term stability of the coupling coefficients of this noise. We show that they drifted slowly (by <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>μm</a:mi><a:mo>/</a:mo><a:mi>rad</a:mi></a:mrow></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>6</c:mn><c:mo>×</c:mo><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>6</c:mn></c:mrow></c:msup></c:math> in 100 days) and were strongly correlated to temperature changes within the satellite (<e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mrow><e:mn>8</e:mn><e:mtext> </e:mtext><e:mtext> </e:mtext><e:mi>μm</e:mi><e:mo>/</e:mo><e:mi>rad</e:mi><e:mo>/</e:mo><e:mi mathvariant="normal">K</e:mi></e:mrow></e:math> and <h:math xmlns:h="http://www.w3.org/1998/Math/MathML" display="inline"><h:mrow><h:mn>30</h:mn><h:mo>×</h:mo><h:msup><h:mrow><h:mn>10</h:mn></h:mrow><h:mrow><h:mo>−</h:mo><h:mn>6</h:mn></h:mrow></h:msup><h:mo>/</h:mo><h:mi mathvariant="normal">K</h:mi></h:mrow></h:math>). Based on analytical tilt-to-length coupling models, we attribute the temperature-driven coupling changes to rotations of the test masses and small distortions in the optical setup. Particularly, our findings lead to the conclusion that LISA Pathfinder’s optical baseplate was bent during the cooldown experiment, which started in late 2016 and lasted several months. Published by the American Physical Society 2024

Physical review. D/Physical review. D.Vol. 110(6)
Leibniz University Hannover (DE), Goddard Space Flight Center (US), Institute of Space Sciences (ES), University of Urbino (IT), University of Trento (IT), University of Zurich (CH), Université Paris Cité (FR), Aristotle University of Thessaloniki (GR), Heidelberg University (DE), Universidad Loyola Andalucía (ES), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), European Space Agency (FR), University of Florida (US), ETH Zurich (CH), Institut d'Estudis Espacials de Catalunya (ES), Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications (IT), Universidad Loyola (BO), Max Planck Institute for Gravitational Physics (DE), CEA Paris-Saclay (FR), Istituto di Fotonica e Nanotecnologie (IT), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Imperial College London (GB), UK Astronomy Technology Centre (GB), University of Glasgow (GB), University of Birmingham (GB), Universitat Politècnica de Catalunya (ES)
National Science Foundation, National Aeronautics and Space Administration, UK Space Agency, Istituto Nazionale di Fisica Nucleare Sezione di Padova, European Space Agency, Scottish Universities Physics Alliance, Imperial College London, University of Glasgow, University of Birmingham, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Generalitat de Catalunya, Centre National d’Etudes Spatiales, Ministerio de Economía y Competitividad, Agenzia Spaziale Italiana, Centre National de la Recherche Scientifique, Ministerio de Ciencia e Innovación, Fundación General CSIC, Bundesministerium für Wirtschaft und Energie, ETH Zürich Foundation, Istituto Nazionale di Fisica Nucleare, Observatoire de Paris, Université de Recherche Paris Sciences et Lettres, Agència de Gestió d'Ajuts Universitaris i de Recerca, Labex UnivEarthS
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Pulsars and Gravitational Waves Research
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