Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7406p&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #74.06; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
The end mirrors of the LISA interferometer are housed within spacecraft which shield them from external disturbances. Couplings between the end mirrors and the spacecraft through electrostatic effects, such as time varying patch fields and cosmic ray charging, and thermal gradient related effects, such as the radiometer effect, radiation pressure, and outgassing, contribute heavily to the LISA noise budget at frequencies below 1 mHz.
We are measuring these forces using a highly sensitive torsion balance. Our apparatus consists of a suspended gold coated silicon pendulum and a movable gold coated split copper plate. Each half of our split copper plate can be individually electro-statically and thermally controlled. We present our current understanding of electrostatic surface potential fluctuations and forces due to thermal effects.
Gundlach Jens H.
Hagedorn Charles A.
Pollack Scott E.
Schlamminger Stephan
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