Particle in cell simulation of kinetic instability of an electron beam in plasma

A parallel 3D numerical model is created on the basis of Particle-In-Cell method. The model is designed for simulation of relaxation processes of the warm electron beam in plasma. Growth saturation of a separate unstable mode is studied in different regimes. The comparative analysis of methods for diagnostics of the instability is carried out. The results accuracy dependence on model particle number is determined. Minimal model particle number for correct instability increment calculation is defined.