Abstract
In the original paper describing the first measurements performed with LISA Pathfinder, a bulge in the acceleration noise was shown in the 200 mHz - 20 mHz frequency band. This bulge noise originated from cross-coupling of spacecraft motion into the longitudinal readout and it was shown that it is possible to subtract this cross-talk noise. We discuss here the model that was used for subtraction as well as an alternative approach to suppress the cross talk by realignment of the test masses. Such a realignment was performed after preliminary analysis of a dedicated cross-talk experiment, and we show the resulting noise suppression. Since then, further experiments have been performed to investigate the cross-coupling behaviour, however analysis of these experiments is still on-going.
Highlights
The well known LISA Pathfinder differential acceleration measurement published in [1] and displayed for convenience in Fig. 1(a), showed a bulge in the noise curve in the 200 mHz 20 mHz frequency band
Each term in this equation defines a cross-coupling of spacecraft motion to the differential acceleration measurement:
The annotation kwith k ∈ {φ, η, y, z}, defines a mean motion of both test masses along k, which is a description of the spacecraft motion along −k
Summary
This content has been downloaded from IOPscience. Ser. 840 012043 (http://iopscience.iop.org/1742-6596/840/1/012043) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 194.95.157.241 This content was downloaded on 13/07/2017 at 10:13 Please note that terms and conditions apply. Gudrun Wanner and Nikolaos Karnesis on behalf of the LISA Pathfinder collaboration Max Planck Institute for Gravitational Physics (Albert Einstein Institute) and Institute for Gravitational Physics of the Leibniz Universitt Hannover
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