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Proceedings Paper

Charging of isolated proof masses in satellite experiments such as LISA
Author(s): Henrique M. Araujo; A. Howard; D. Davidge; Timothy J. Sumner
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Paper Abstract

We report on a Monte Carlo simulation of electrostatic charging of the LISA proof masses by cosmic-ray protons and alpha particles, developed using the Geant4 toolkit. A positive charging rate of 58+/-17 +e/s (proton charges per second) was obtained with the minimum Geant4 energy threshold for the production of secondary particles by electromagnetic processes. This charging rate does not seem to depend strongly on the tracking of low-energy secondary electrons, and is some 5 times larger than that found in previous simulations. The difference is only partly explained by the slightly larger proof mass considered in this study. This figure is used to place new limits on the required discharge time of the LISA test masses.

Paper Details

Date Published: 26 February 2003
PDF: 12 pages
Proc. SPIE 4856, Gravitational-Wave Detection, (26 February 2003); doi: 10.1117/12.461504
Show Author Affiliations
Henrique M. Araujo, Imperial College of Science, Technology and Medicine (United Kingdom)
A. Howard, Imperial College of Science, Technology and Medicine (United Kingdom)
D. Davidge, Imperial College of Science, Technology and Medicine (United Kingdom)
Timothy J. Sumner, Imperial College of Science, Technology and Medicine (United Kingdom)


Published in SPIE Proceedings Vol. 4856:
Gravitational-Wave Detection
Peter Saulson; Adrian M. Cruise, Editor(s)

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