Dromion structure in (2+1)-dimensional modulated positron-acoustic waves in a non-Maxwellian magnetoplasma

Abstract This study investigates the dromion structure within the context of (2+1)-dimensional modulated positron-acoustic waves in a magnetoplasma consisting of inertial cold positrons and inertialess nonthermal hot electrons and positrons as well as stationary positive ions. The reductive perturbation approach reduces the fluid governing equations to the plasma model to a Davey–Stewartson system. This study provides a detailed analysis of the influence of many related plasma parameters, including the density ratio of hot and cold positrons, the external magnetic field strength, the nonthermal parameter and the density ratio of electrons and cold positrons, on the growing rate of instability. Using the Hirota Bilinear method, it is found that the system supports some exact solutions, such as one- and two-dromion solutions. The change of plasma parameters significantly enhances the characteristics of dromion solutions. The elastic and inelastic collisions between two dromions are discussed at different times. The relevance of this study can help us to understand the various types of collision between energetic particles in confined plasma during the production of energy by thermonuclear fusion.