Measuring the LISA test mass magnetic proprieties with a torsion pendulum

Abstract

Achieving the low frequency LISA sensitivity requires that the test masses acting as the interferometer end mirrors are free-falling with an unprecedented small degree of deviation. Magnetic disturbances, originating in the interaction of the test mass with the environmental magnetic field, can significantly deteriorate the LISA performance and can be parameterized through the test mass remnant dipole moment ${\vec{m}}_r$ and the magnetic susceptibility $\chi$. While the LISA test flight precursor LTP will investigate these effects during the preliminary phases of the mission, the very stringent requirements on the test mass magnetic cleanliness make ground-based characterization of its magnetic proprieties paramount. We propose a torsion pendulum technique to accurately measure on ground the magnetic proprieties of the LISA/LTP test masses.

arXiv comment6 pages, 3 figures

References in corpus (5)

• Sub-millimeter Tests of the Gravitational Inverse-square Law
• Achieving geodetic motion for LISA test masses: ground testing result
• Characterization of disturbance sources for LISA: torsion pendulum results
• Measuring random force noise for LISA aboard the LISA Pathfinder mission
• Upper limits on stray force noise for LISA

Cited by in corpus (6)

• LISA technology and instrumentation
• Thermal gradient-induced forces on geodetic reference masses for LISA
• Low-frequency noise characterization of a magnetic field monitoring system using an anisotropic magnetoresistance
• Interpolation of the magnetic field at the test masses in eLISA
• An overview of the Laser Interferometer Space Antenna
• Design of a CubeSat Payload to Test a Magnetic Measurement System for Space-borne Gravitational Wave Detectors