Density filamentation nonlinearly driven by the Weibel instability in relativistic beam plasmas

  title={Density filamentation nonlinearly driven by the Weibel instability in relativistic beam plasmas},
  author={Cong Tuan Huynh and C. Ryu and Chul Min Kim},
  journal={Physics of Plasmas},
Density filamentation has been observed in many beam-plasma simulations and experiments. Because current filamentation is a pure transverse mode, charge density filamentation cannot be produced directly by the current filamentation process. To explain this phenomenon, several mechanisms are proposed such as the coupling of the Weibel instability to the two-stream instability, coupling to the Langmuir wave, differences in thermal velocities between the beam and return currents, the magnetic… 

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