MG14 - Talk detail |
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Participant |
Paczkowski, Sarah | |||||||
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Institution |
AEI Hannover - Callinstrasse 38 - Hannover - Niedersachsen - Germany | |||||||
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Session |
GW3 |
Accepted |
Yes |
Order |
7 |
Time |
17:20 | 15' |
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Talk |
Oral abstract |
Title |
The Free-Flight Experiment on LISA Pathfinder | |||||
| Coauthors | Armano, Michele; Audley, Heather; Diepholz, Ingo; Ferraioli, Luigi; Gibert, Ferran; Hewitson, Martin; Hueller, Mauro; Karnesis, Nikolaos; Kaune, Brigitte; Korsakova, Natalia; Nofrarias, Miquel; Plagnol, Eric; Vitale, Stefano; Thorpe, James Ira; Ferroni, Valerio; Vetrugno,Daniele; Inchauspe, Henri; Wass, Peter; Dolesi, Rita; Weber, William Joseph; Danzmann, Karsten; Jennrich, Oliver; McNamara,Paul W.; Wittchen, Andreas | |||||||
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Abstract |
LISA Pathfinder is a technology demonstrator mission for future gravitational wave detection in space to be launched in autumn 2015. It’s main goal is to show the feasibility of an inertial test mass and to estimate the residual differential force noise. The current best estimate of the LISA Pathfinder noise performance, which is well below the requirements, is limited by electrostatic actuation noise towards the lower end of the measurement band. This becomes more significant considering that this actuation is not present in the current design of a LISA-like mission. A solution to assess the underlying noise is provided by the free-flight experiment where the x-axis actuation is switched off for short regular intervals. The actuation is periodically restored to ‘kick’ the test mass back to its nominal position. These force ‘kicks’ are noisy and therefore the data in these sections must be ignored when trying to estimate the quiet residual differential acceleration between the kicks. The resulting gaps present an interesting data analysis challenge. In this talk, I will present a new approach to fit individual free-flight segments in the time-domain and an outline of the analysis during operations. |
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Pdf file |
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