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Solitary Langmuir waves in two-electron temperature plasma

Published online by Cambridge University Press:  25 November 2013

V. V. Prudkikh
V. V. Prudkikh*
Affiliation:
Department of Physics, Southern Federal University, Rostov-on-Don, Russia
*
†Email address for correspondence: [email protected]
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Abstract

Nonlinear interaction of Langmuir and ion-acoustic waves in two-electron temperature plasma is investigated. New integrable wave interaction regime was discovered, this regime corresponds to the Langmuir soliton with three-hump amplitude, propagating with a speed close to the ion–sound speed in the conditions of strong non-isothermality of electronic components. It was discovered that besides the known analytical solution in the form of one- and two-hump waves, there exists a range of solutions in the form of solitary waves, which in the form of envelope has multi-peak structure and differs from the standard profiles described by hyperbolic functions. In case of fixed plasma parameters, different group velocities correspond to the waves with different number of peaks. It is found that the Langmuir wave package contains both even and uneven numbers of oscillations. Low-frequency potential here has uneven number of peaks. Interrelation of obtained and known earlier results are also discussed.

Type
Papers
Information
Journal of Plasma Physics , Volume 80 , Issue 3 , June 2014 , pp. 405 - 415
Copyright
Copyright © Cambridge University Press 2013 

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References

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