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 language | English |
|---|---|
| Number of pages | 16 |
| Journal | Physics of Plasmas |
| Volume | 13 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 8 Aug 2006 |
Keywords
- plasma
- astryphysical plasma
- electromagnetic pulse
- kinetic photon equation
- broadband pulse
- electromagnetic waves
- electron-positron plasma