Steady motion of a space-limited beam of energetic electrons in a cold plasma

Computer Science – Sound

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Beam Injection, Cold Plasmas, Electron Beams, High Energy Electrons, Ionospheric Electron Density, Plasma-Particle Interactions, Collisionless Plasmas, Distribution Functions, Electron Flux Density, Particle Motion, Rocket Sounding

Scientific paper

An equilibrium distribution function is obtained in analytic form for a space-limited electron beam moving through a cold collisionless plasma; the present study pertains to electron injection experiments in the ionosphere (particularly the Araks experiment). In the case of a weak beam, the distribution function approaches a single-flux one; the potential within the beam is directly proportional to the energy density of injected electrons and inversely proportional to the concentration of the background plasma. In the case when the beam particle concentration approaches the background electron concentration, the equilibrium distribution function approaches a double-flux one, while the beam potential approaches the injection potential and the beam velocity decreases.

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