Two-Dimensional Nonlinear Evolution of the Electron-Beam-Plasma Instability

Details Two-Dimensional Nonlinear Evolution of the Electron-Beam-Plasma Instability Two-Dimensional Nonlinear Evolution of the Electron-Beam-Plasma Instability

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh31a1655r&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH31A-1655

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2159 Plasma Waves And Turbulence

Scientific paper

Recently, numerical and simulation efforts on the weak beam plasma interactions in one-dimensional space showed that the collisionallity of a plasma does a crucial role for electron acceleration and suprathermal tail generation. In this situation the collisionallity related to nonlinear wave-particle effects brings the Langmuir inverse cascade and this makes heating. Another effort, beam plasma interaction in weakly turbulent regime is numerically investigated including 2nd order nonlinear effect by Ziebell et al in the 2D space. This shows that, inverse cascade of 1D situation is numerical projection effect, and thus inverse cascade is not generated. Evolution of a two-dimensional electron-beam-plasma system is studied using a particle-in-cell (PIC) simulation. At the same time, the set of the quasilinear equations is numerically solved allowing direct comparisons of obtained electron and Langmuir wave distributions to the simulation results. From the comparison, it is found that the spectrum of the primary Langmuir wave obtained from PIC simulation is attributed to the linear wave-particle interaction. Furthermore we run simulations until the nonlinear interaction regime to examine the Langmuir wave inverse cascade and superthermal tail generation. We will present the nonlinear evolution of the electron distribution and Langmuir wave spectrum in a 2D simulation space.

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