Dynamics of Two-dimensional Type III Electron Beams in Randomly Inhomogeneous Solar Wind Plasmas

Abstract The dynamics of a type III electron beam generating Langmuir wave turbulence and subsequent electromagnetic emissions is studied owing to two-dimensional Particle-In-Cell simulations performed in both homogeneous randomly inhomogeneous solar wind plasmas. Important differences the are highlighted between cases, due waves’ transformations on density fluctuations. This paper studies weak interacting with scattered by initially applied plasma fluctuations, terms particle acceleration, non-Gaussian suprathermal tails, broadening relaxation velocity distributions, localization, diffusion or trapping turbulent plasma. Density fluctuations cause acceleration during its stage; after saturation, it gains up half energy lost deceleration while damping, exhibiting asymptotically tail electrons carrying around 30% initial kinetic energy. Some important features observed for one-dimensional beams exciting plasmas can be recovered.