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Preliminary results on the suppression of sensing cross-talk in LISA Pathfinder

Wanner, Gudrun ; Karnesis, Nikolaos

Journal of physics. Conference series, 2017-05, Vol.840 (1), p.12043 [Peer Reviewed Journal]

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Title:
Preliminary results on the suppression of sensing cross-talk in LISA Pathfinder
Author: Wanner, Gudrun ; Karnesis, Nikolaos
Subjects: Cross coupling ; Crosstalk ; Frequencies ; Noise reduction ; Physics ; Realignment ; Spacecraft motion ; Subtraction
Is Part Of: Journal of physics. Conference series, 2017-05, Vol.840 (1), p.12043
Description: 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.
Publisher: Bristol: IOP Publishing
Language: English

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