Secondary electron emission impact on the tungsten dust particle in a plasma with super‐extensive electrons

Abstract

Effect of the secondary electron emission (SEE) on the tungsten dust particle in a plasma with super‐extensive electrons is studied in the energy range of 100.25emnormaleV<Te<300.25emnormaleV$$ 10\ \mathrm{eV}<{\mathrm{T}}_{\mathrm{e}}<30\ \mathrm{eV} $$. With the increasing q‐parameter, the dust particle potential normalized by the electron temperature decreases first and then increases when we consider the SEE including the backscattered electron, inelastic reflection electron and true‐secondary electron process, while it increases monotonously if only the true‐secondary electron process is taken into account. By compared to the case without SEE, the presence of SEE causes the obvious increases of the normalized dust particle potential for the small q‐parameter and high electron temperature, and the resultant dust particle temperature to reach the melting temperature or saturated state faster in the dust particle heating process.