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Transport model of charged particle behavior in the afterglow region of a microwave generated oxygen plasma

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2 Author(s)
Wei, Ta‐Chin ; Department of Chemical Engineering, The Pennsylvania State University, 133 Fenske Laboratory, University Park, Pennsylvania 16802‐4400 ; Phillips, Jonathan

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In this paper a model of charged particle behavior in a low‐pressure oxygen plasma is developed, and compared with experimental results. Agreement is excellent. It is demonstrated that the extremely high temperature (≳1 eV) of electrons in these plasmas results in diffusion totally dominating the transport of charged species. It is also shown that charged particle recombination on the walls of a quartz reactor is insignificant. Finally, the influence of the electron temperature profile must be fully considered for accurate results. This work complements an earlier model of radical behavior in these plasmas. Both are needed to fully understand materials modification in these plasmas, which has been shown to involve a synergism between radicals and charged species.

Published in:

Journal of Applied Physics  (Volume:74 ,  Issue: 2 )