Multispecies plasma expansion into vacuum: The role of secondary ions and suprathermal electrons

I. S. Elkamash, I. Kourakis

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17 Scopus citations

Abstract

The self-similar expansion of multispecies ion plasma is investigated by a two-ion fluid model with adiabatic equation of state for each ionic species. Our aim is to elucidate the effect of secondary ions on a plasma expansion front, in combination with energetic (suprathermal) electrons in the background, modeled by a kappa-type distribution function. The plasma density, velocity, and electric-field profile is investigated. It is shown that energetic electrons have a significant effect on the expansion front dynamics, essentially energizing the front, thus enhancing the ion acceleration mechanism. Different special cases are considered as regards the relative magnitude of the ion mass and/or charge state.

Original languageBritish English
Article number053202
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume94
Issue number5
DOIs
StatePublished - 2016

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