The electron-acoustic mode

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摘要：

This paper examines electrostatic modes in an unmagnetized, homogeneous, Vlasov plasma with three Maxwellian components: ions, hot electrons, and cool electrons. In such a plasma, the electron-acoustic mode with frequencies between the ion and electron plasma frequencies may propagate with light damping. The conditions that allow propagation of this mode, which is distinct from the well-known ion-acoustic and Langmuir waves, are given in detail; approximate necessary conditions are 10T/Tand 0<n<0.8n, where the subscripts c, h, and e refer to the cool and hot electron components and the total electron population, respectively.

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关键词：

Theoretical or Mathematical/ electromagnetism hot carriers plasma instability plasma theory Vlasov equation/ ion plasma frequencies cool electron components electron-acoustic mode electrostatic modes unmagnetized homogeneous Vlasov plasma Maxwellian components ions hot electrons cool electrons electron plasma frequencies light damping Langmuir waves hot electron components/ A5225 Plasma properties A5235P Plasma instabilities