Langmuir wave dispersion relation in non-Maxwellian plasmas

Ouazene, M.; Annou, R.
May 2010
Physics of Plasmas;May2010, Vol. 17 Issue 5, p052105
Academic Journal
The Langmuir wave dispersion relation is derived in partially ionized plasmas, where free electrons are confined to move in a nearest neighbor ions’ potential well. The equilibrium velocity distribution function experiences then, a departure from Maxwell distribution function. The effect of the non-Maxwellian character of the distribution function on the Langmuir phase and group velocities as well as the phase matching conditions and the nonlinear growth rate of decay instability is investigated. The proposed Langmuir wave dispersion relation is relevant to dense and cryogenic plasmas.


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