Nonlinear Kinetic Development of the Weibel Instability and the generation of electrostatic coherent structures

Details Nonlinear Kinetic Development of the Weibel Instability and the generation of electrostatic coherent structures Nonlinear Kinetic Development of the Weibel Instability and the generation of electrostatic coherent structures

2010-08-13

arxiv.org/abs/1008.2336v1

Plasma Phys. Control. Fusion 51 (2009) 125006

Physics

Plasma Physics

12 pages

Scientific paper

10.1088/0741-3335/51/12/125006

The nonlinear evolution of the Weibel instability driven by the anisotropy of the electron distribution function in a collisionless plasma is investigated in a spatially one-dimensional configuration with a Vlasov code in a two-dimensional velocity space. It is found that the electromagnetic fields generated by this instability cause a strong deformation of the electron distribution function in phase space, corresponding to highly filamented magnetic vortices. Eventually, these deformations lead to the generation of short wavelength Langmuir modes that form highly localized electrostatic structures corresponding to jumps of the electrostatic potential.

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