Upper limits to surface force disturbances on LISA proof masses and the possibility of observing galactic binaries
- Ludovico Carbone(,)
- Trento U. and
- INFN, Trento and
- CNR, CeFSA
- ,
- Giacomo Ciani(,)
- Trento U. and
- INFN, Trento and
- CNR, CeFSA
- Rita Dolesi(,)
- Trento U. and
- INFN, Trento and
- CNR, CeFSA
- Mauro Hueller()
- Trento U. and
- INFN, Trento and
- CNR, CeFSA
Citations per year
Abstract: (arXiv)
We report on the measurement of parasitic surface force noise on a hollow replica of a LISA (Laser Interferometer Space Antenna for the observation of gravitational waves) proof mass surrounded by a faithful representation of its in flight surroundings, namely the capacitive sensor used to detect proof-mass motion. Parasitic forces are detected through the corresponding torque exerted on the proof mass and measured with a torsion pendulum in the frequency range 0.1 30 mHz. The sensor electrodes, electrode housing and associated readout electronics have the same nominal design as for the flight hardware, including 4 mm gaps around the proof mass along the sensitive laser interferometry axis. We show that the measured upper limit for surface forces would allow detection of a number of galactic binaries signals with signal to noise ratio up to approximately 40 for 1 year integration. We also discuss how the flight test under development, LISA Pathfinder, will substantially improve this limit, approaching the performance required for LISA.- 95.55.Ym
- 04.80.Nn
- 07.87.+v
- LISA
- laser: interferometer
- noise
- mass
- force: surface
- experimental methods: torsion
- electronics
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