Debye Shielding in a Spatially non-uniform Plasma: Application to Plasma Wake Current Collection

Details Debye Shielding in a Spatially non-uniform Plasma: Application to Plasma Wake Current Collection Debye Shielding in a Spatially non-uniform Plasma: Application to Plasma Wake Current Collection

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf..269c&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.269-273

Physics

Scientific paper

The problem of current collection by an electrically biased object in a plasma wake is treated in the context of Debye shielding by a spatially non-uniform plasma. An analytical expression for the decay of the exposed potential in this non-uniform medium is derived, from which an upper bound on collected current as a function of voltage is determined based on the principle of a potential "scoop" pushing its was into the ambient plasma flow. The analytical treatment shows significant agreement to on-orbit current collection data.

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