Influence of Emitted Electrons Transiting Between Surfaces on Plasma-Surface Interaction
Authors: M.D. Campanell and H. Wang
Abstract:
Emitted electrons are accelerated back into the plasma by the sheath. If their mean free path is
large, they can propagate directly to another surface without suffering collisions. We analyze effects
of "transit" on plasma -surface interaction. When transit occurs, surfaces exchanging electrons are
intricately coupled. All surfaces float more negatively than they would if the emission collisionally
remixed with the bulk plasma. Asymmetries of the system drive a net "transit current" between the
surfaces, which influences their potential difference. The larger the initial energy spread of the
emitted electrons, the larger the potential difference.
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Submitted to: Applied Physical Letters, (August 2013)
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