Ion-acoustic enhancements generated by beam-plasma instability in an auroral cavity

摘要: [1] This article demonstrates the generation of enhanced ion-acoustic waves by beam-plasma instability in a density cavity. The self-consistent equations weak turbulence theory that include quasi-linear, decay, and scattering processes as well convective dispersive effects are numerically solved for one-dimensional It is shown significant enhancements occur presence counterstreaming electron beams initially localized near center cavity at large wavelengths. Later evolution, enhancement spectrum spreads out toward edges cavity, with shift to smaller wavelengths, while tends decrease magnitude. significance present findings discussed.