Nonlinear propagation of broadband intense electromagnetic waves in an electron-positron plasma
Abstract
A kinetic equation describing the nonlinear evolution of intense electromagnetic pulses in electron-positron (e-p) plasmas is presented. The modulational instability is analyzed for a relativistically intense partially coherent pulse, and it is found that the modulational instability is inhibited by the spectral pulse broadening. A numerical study for the one-dimensional kinetic photon equation is presented. Computer simulations reveal a Fermi-Pasta-Ulam-like recurrence phenomena for localized broadband pulses. The results should be of importance in understanding the nonlinear propagation of broadband intense electromagnetic pulses in e-p plasmas in laser-plasma systems as well as in astrophysical plasma settings.
Keywords
Cite
@article{arxiv.physics/0607170,
title = {Nonlinear propagation of broadband intense electromagnetic waves in an electron-positron plasma},
author = {M. Marklund and B. Eliasson and P. K. Shukla},
journal= {arXiv preprint arXiv:physics/0607170},
year = {2007}
}
Comments
16 pages, 5 figures, to appear in Phys. Plasmas