Tilt-to-length coupling in LISA Pathfinder: long-term stability
Instrumentation and Methods for Astrophysics
2024-09-17 v1
Abstract
The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular timespans. In this work, we investigate the long-term stability of the coupling coefficients of this noise. We show that they drifted slowly (by 1\,m/rad and 6 in 100 days) and strongly correlated to temperature changes within the satellite (8\,m/rad/K and 30/K). Based on analytical TTL coupling models, we attribute the temperature-driven coupling changes to rotations of the test masses and small distortions in the optical setup. Particularly, we show that LISA Pathfinder's optical baseplate was bent during the cooldown experiment, which started in late 2016 and lasted several months.
Keywords
Cite
@article{arxiv.2407.05852,
title = {Tilt-to-length coupling in LISA Pathfinder: long-term stability},
author = {M Armano and H Audley and J Baird and P Binetruy and M Born and D Bortoluzzi and E Castelli and A Cavalleri and A Cesarini and A M Cruise and K Danzmann and M de Deus Silva and I Diepholz and G Dixon and R Dolesi and L Ferraioli and V Ferroni and E D Fitzsimons and M Freschi and L Gesa and D Giardini and F Gibert and R Giusteri and C Grimani and J Grzymisch and I Harrison and M-S Hartig and G Heinzel and M Hewitson and D Hollington and D Hoyland and M Hueller and H Inchauspé and O Jennrich and P Jetzer and U Johann and B Johlander and N Karnesis and B Kaune and C J Killow and N Korsakova and J A Lobo and J P López-Zaragoza and R Maarschalkerweerd and D Mance and V Martín and L Martin-Polo and F Martin-Porqueras and J Martino and P W McNamara and J Mendes and L Mendes and N Meshksar and M Nofrarias and S Paczkowski and M Perreur-Lloyd and A Petiteau and E Plagnol and J Ramos-Castro and J Reiche and F Rivas and D I Robertson and G Russano and J Sanjuan and J Slutsky and C F Sopuerta and T Sumner and D Texier and J I Thorpe and D Vetrugno and S Vitale and G Wanner and H Ward and P J Wass and W J Weber and L Wissel and A Wittchen and P Zweifel},
journal= {arXiv preprint arXiv:2407.05852},
year = {2024}
}