Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-12-19
Class.Quant.Grav. 22 (2005) S521-S526
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
6 pages, 3 figures
Scientific paper
10.1088/0264-9381/22/10/052
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.
Armano Michele
Carbone Laurent
Cavalleri Andrea
Dolesi Rita
Hoyle Charles D.
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