0 6 Nonlinear propagation of broadband intense electromagnetic waves in an electron – positron plasma
نویسنده
چکیده
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 laserplasma systems as well as in astrophysical plasma settings. PACS numbers: 52.38.-r, 52.27.Ny, 52.65.Rr
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