Abstract

A one-dimensional two-fluid model of the plasma-wall transition in front of a large, negative, planar electrode is presented. The electrons are assumed to be isothermal, while for the ions the closure is made by the assumption that the ion heat flux is proportional to the negative gradient of the ion temperature. The introduction of the ion heat flow into the model changes the ion flow towards the electrode from mainly adiabatic into almost isothermal.

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