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 Institute: MPI für Gravitationsphysik         Display Documents

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ID: 346519.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
Subtraction of test mass angular noise in the LISA technology package interferometer
Authors:
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Applied Physics B
Volume:90
Issue / Number:3-4
Start Page:395
End Page:400
Review Status:not specified
Audience:Not Specified
Abstract / Description:When the position of a test mass in one dimension is measured with picometer accuracy, angular alignment jitter inevitably couples noise into the measurement. We present recent sensitivity measurements of the LISA technology package interferometer with articulated mirrors as test masses, actuated by piezo-electric transducers. The required longitudinal displacement resolution of 9pm$/\sqrt{\text{Hz}}$ above 3 mHz has been demonstrated with an angular noise that corresponds to the expected for on-orbit operation. The excess noise contribution of this test mass jitter onto the sensitive displacement readout was completely subtracted by fitting the angular interferometric data streams to the longitudinal displacement measurement. Thus, this cross-coupling constitutes no limitation to the required performance of the LISA technology package interferometry.
External Publication Status:published
Document Type:Article
Communicated by:Karsten Danzmann
Affiliations:
Identifiers:DOI:10.1007/s00340-007-2923-0