Precision measurements of the magnetic parameters of LISA Pathfinder test masses

Thumbnail Image

Files

PhysRevD.111.042007.pdf (2.12 MB)

Links to Files

https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.042007

Permanent Link

https://doi.org/10.1103/PhysRevD.111.042007
 http://hdl.handle.net/11603/37970

Collections

UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0002-4429-0682

Date

2025-02-18

Type of Work

journal articles
Text

Department

Program

Citation of Original Publication

Armano, M., H. Audley, J. Baird, P. Binetruy, M. Born, D. Bortoluzzi, E. Castelli, et al. "Precision Measurements of the Magnetic Parameters of LISA Pathfinder Test Masses". Physical Review D 111, no. 4 (February 18, 2025): 042007. https://doi.org/10.1103/PhysRevD.111.042007.

Rights

This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain

Subjects

Abstract

A precise characterization of the magnetic properties of LISA Pathfinder free falling test-masses is of special interest for future gravitational wave observatory in space. Magnetic forces have an important impact on the instrument sensitivity in the low frequency regime below the millihertz. In this paper we report on the magnetic injection experiments performed throughout LISA Pathfinder operations. We show how these experiments allowed a high precision estimate of the instrument magnetic parameters. The remanent magnetic moment was found to have a modulus of (0.245±0.081)  nAm², the x-component of the background magnetic field within the test masses position was measured to be (414±74)  nT and its gradient had a value of (−7.4±2.1)  μ⁢T/m. Finally, we also measured the test mass magnetic susceptibility at 5 mHz to be (−3.3723±0.0069)×10⁻⁵. All results are in agreement with on-ground estimates.