Injection of 40 kHz-modulated electron beam from the satellite: I. Beam-plasma interaction near the linear stability boundary

Anomalous wave effects and stimulated charged particle fluxes were registered during 40 kHz-modulated electron beam injection in active space experiment carried out in a double satellite system. To explain these effects, the beam-plasma instability for a two-wave longitudinal interaction has been considered. The growth of instability depends on the frequency and wavenumber detunings between these longitudinal waves one of them is a slow beam mode with negative or zero wave energy defined near the linear stability boundary.