Magnetic-induced force noise in LISA Pathfinder free-falling test masses

2024/07/05 by M Armano, H Audley, J Baird +76 · 1 voice
Physics and Astronomy · #astro-ph.IM #gr-qc

paper · pdf · doi:10.1103/physrevlett.134.071401

arxiv published 2024/07/05 · arxiv updated 2024/11/05

Abstract

LISA Pathfinder was a mission designed to test key technologies required for gravitational wave detection in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime, which corresponds to the measurement band of interest for future space-borne gravitational wave observatories. Magnetic-induced forces couple to the test mass motion, introducing a contribution to the relative acceleration noise between the free falling test masses. In this Letter we present the first complete estimate of this term of the instrument performance model. Our results set the magnetic-induced acceleration noise during the February 2017 noise run of \rm 0.25_-0.08^+0.15 fm s^-2/√(Hz) at 1 mHz and \rm 1.01_-0.24^+0.73 fm s^-2/√(Hz) at 0.1 mHz. We also discuss how the non-stationarities of the interplanetary magnetic field can affect these values during extreme space weather conditions.

Discussions

• Magnetic-induced force noise in #LISAPathfinder free-falling test masses: arxiv.org/abs/2407.04427 -> These magnetic results will attract your attention: astrobites.org/2024/12/21/t... [bsky, 0 points, 0 comments]

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