Formation and Dynamics of Relativistic Electromagnetic Solitons in Plasmas Containing High and Low-Energy Electron Components
B. Eliasson, P. K. Shukla
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
PACS: 52.35.-g, 52.38.Dx
Abstract
We present theoretical and numerical studies of the nonlinear
interactions between intense electromagnetic waves in plasmas containing high
and low-energy electron components. Such plasmas are frequently observed in
laser-plasma experiments, where the hot electron component is created by the
acceleration of electrons by strong electrostatic waves that are
created by the laser induced Raman forward and backward instabilities.
The two-component electron plasma is described by the Vlasov equation
for the hot electrons and the hydrodynamic equations for the cold electrons,
which are coupled nonlinearly with the electromagnetic wave equation
and the Poisson equation for the potential. The present nonlinear
system is shown to admit electromagnetic solitary waves correlated
with a positive potential and trapped electron islands from the hot electron
population.