Computer Science
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4856...43s&link_type=abstract
Gravitational-Wave Detection. Edited by Cruise, Mike; Saulson, Peter. Proceedings of the SPIE, Volume 4856, pp. 43-54 (2003).
Computer Science
5
Scientific paper
LISA employs a capacitive sensing and positioning system to maintain the drag free environment of the test masses acting as interferometer mirror elements. The need for detailed electrostatic modelling of the test mass environment arises because any electric field gradient or variation associated with test mass motion can couple the test mass to its housing, and ultimately the spacecraft. Cross-couplings between components in the system can introduce direct couplings between sensing signals, sensing axes and the drive signal. A variation in cross-couplings or asymmetry in the system can introduce capacitance gradients and second derivatives, giving rise to unwanted forces and spring constant modifications. These effects will vary dependent on the precise geometry of the system and will also tend to increase the sensitivity to accumulated charge on the test-mass. Presented are the results of a systematic study of the effect of the principal geometry elements (e.g. machining imperfections, the caging mechanism) on the test mass electrostatic environment, using the finite element code ANSYS. This work is part of an ongoing ESA study into drag-free control for LISA and the LTP on SMART 2 and ultimately aims to eliminate geometries that introduce too large a disturbance and optimise the electrostatic design.
Shaul Diana N.
Sumner Timothy J.
No associations
LandOfFree
Electrostatic modeling for LISA does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electrostatic modeling for LISA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic modeling for LISA will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1171890