Nonlinear propagation of broadband intense electromagnetic waves in an electron-positron plasma

M. Marklund, B. Eliasson, P.K. Shukla

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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.
Original languageEnglish
Number of pages16
JournalPhysics of Plasmas
Volume13
Issue number8
DOIs
Publication statusPublished - 8 Aug 2006

Keywords

  • plasma
  • astryphysical plasma
  • electromagnetic pulse
  • kinetic photon equation
  • broadband pulse
  • electromagnetic waves
  • electron-positron plasma

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