Noncollisional Relaxation of Warm Electron Beam with 'Subcritical' Density Being Injected to Plasma

The paper describes results of the exact kinetic modeling of SIEB (Steadily Injected Electron Beam) problem for very weak beam (n_b / n₀=1/5000) with the variety of beam electrons' velocities equal to 5 V_Te (V₂=2V₁=5V_Te). One can look the run as Crucial Experiment for studying of nature of fine nonlinear mechanisms of beam relaxation, beam instability saturation and the space-time dissipative structures generation for open nonstationary systems. Thus, the limitations of the quasilinear theory (QLT) were found for SIEB problem, even in case of very weak beams. Correlation effects play the principal role in this case.