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Managing spherical proof masses in drag-free satellites with application to the LISA experiment

Benjamin Lange

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The very low specific-force noise specification of the LISA mission requires a drag-free satellite for its realization. Not only is the lowest specific-force noise most likely to be achieved by a completely free-floating proof mass with a wide gap and no applied forces or torques, but the performance of such a system can be assured by prior drag-free satellite experience so that a technology demonstration mission for the drag-free specification would not be needed. Better performance can be achieved if it is possible to present a defined reflecting surface to the laser beam. This paper discusses the techniques of having a defined surface and other issues involved with spherical proof masses.


PACS

04.80.Nn Gravitational wave detectors and experiments

95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)

07.87.+v Spaceborne and space research instruments, apparatus, and components (satellites, space vehicles, etc.)

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 19 (7 October 2001)

Received 5 July 2001

Published 17 September 2001



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