Description of charging/discharging processes of the LISA sensors

Details Description of charging/discharging processes of the LISA sensors Description of charging/discharging processes of the LISA sensors

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cqgra..21s.597s&link_type=abstract

Classical and Quantum Gravity, Volume 21, Issue 5, pp. S597-S602 (2004).

Astronomy and Astrophysics

Astronomy

6

Scientific paper

The next generation of gravitational experiments in space is likely to use completely isolated proof-masses. For example, LISA uses proof-masses as mirrors in interferometers for gravitational wave astronomy (Bender et al 1998 Pre-phase A report MPG-233 pp 1 191) and STEP uses proof-masses in Earth orbit for an equivalence principle test (Sumner et al 2003 at press). Nongravitational forces will act on these proof-masses if they become charged, through the action of cosmic rays and solar flare particles for example. This paper examines the consequences of proof-mass charging for LISA, and presents results from using GEANT4 to assess the charging processes. Finally, there is a brief discussion of a means of controlling the charge down to an acceptable level.

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