Propagation of Solitary Waves and Double-Layers in Electron–Positron Pair Plasmas with Stationary Ions and Nonextensive Electrons

摘要: Based on reductive perturbation theory, the nonlinear structure of non-extensive multispecies plasma containing hot electrons, adiabatic cold positrons and ions has been investigated via different KdV, mKdV Gardner’s equations. It is shown that formation properties electron acoustic solitary waves double-layer can exist in such system depending some relevant physical parameters as positron density ratios, electrons temperatures ratio parameter. The existence conditions these types are extensively discussed. obtained results may be useful improving understanding propagation space plasma, Earth’s magnetosphere solar wind.