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Paper   IPM / Physic / 7823
School of Physics
  Title:   Nonlinear Dynamic of Low-Frequency Buneman Instability of A Current-Driven Plasma
1.  B. Shokri
2.  A.R. Niknam
  Status:   Published
  Journal: Phys. Plasmas
  Vol.:  12
  Year:  2005
  Pages:   062110
  Supported by:  IPM
Theoretical investigation of the nonlinear dynamic of the low-frequency Buneman instability of a current-driven plasma is presented. In the nonlinear stage, this instability is described by the diffusion equation with a negative nonlinear diffusion coefficient. As a result, the plasma density profile reaches a sharp peak and is accompanied by the breakdown of quasineutrality and establishment of stationary self-focusing structures.

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