Inertial sensor for the gravity wave missions

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Gravitational Wave Detectors And Experiments, Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques

Scientific paper

Several space missions have been proposed in the present years for the observation of the gravity waves by exploiting laser interferometry between three or six satellites. The laser links between the satellites constitute the arms of the interferometer of a few million kilometers long. Beside the difficulties of the interferometer exhibiting picometer accuracy, the interferometer mirrors are obtained with the proof-masses of inertial sensors that must present outstanding accuracy. The development of such an instrument has been undertaken. It is derived from existing space accelerometers. The mission requirements are presented and the approach to reach the performances is detailed. A sensor prototype, which has been defined on the basis of theoretical analysis and on the experience already acquired with similar accelerometers, is presently produced in view of ground and in orbit design evaluations. This prototype is also described in the paper.

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