We discuss the nonlinear evolution of the Weibel instability of two counter-streaming electron beams in the relativistic and non-relativistic regimes in the framework of a two-fluid description. We show the presence of two singularities per wavelength, responsible for the formation of very large density spikes. In the case of non-symmetric beams, we observe the compressive wave-break of the fast electron population, and the generation of a dipolar magnetic field associated with a central fast thin current and two larger slow return currents. This structure is very similar to those observed in PIC simulations of laser-plasma interactions.
|Autori:||Califano F; Prandi R; Pegoraro F; Bulanov SV|
|Titolo:||Magnetic-field generation and wave-breaking in collisionless plasmas|
|Anno del prodotto:||1998|
|Digital Object Identifier (DOI):||10.1017/S0022377898006862|
|Appare nelle tipologie:||1.1 Articolo in rivista|