Simulation Study of the Effects of Localized Electron Temperature Disturbance on the Quasilinear Dynamics of Beam Propagating Through Solar Corona

摘要

The effects of spatial variations of the coronal electron temperature (spatially localized disturbances in T_e) on the propagation of a cloud of hot electrons through solar corona plasma and generation of Langmuir waves are investigated using numerical simulations of the quasilinear equations. It is found that the level of Langmuir waves decreases (increases) in the presence of localized enhancement (suppression) in T_e. The average velocity of the beam propagation at the points where T_e has disturbances decreases (increases) in the presence of localized enhancement (suppression) in T_e and is constant at otherwhere as in a plasma with constant temperature. Also the influence of the presence of localized T_e disturbances on the evolution of gasdynamical parameters is investigated. The spatially localized disturbances in T_e doesn't affect the upper boundary of plateau while lower boundary increases (decreases) in the presence of localized enhancement (suppression) in T_e. It is shown that the self-similar characteristic of the system is preserved in the presence of fluctuations in the electron temperature. The local velocity of the beam (velocity spread of the beam) increases (decreases) in the presence of localized enhancement (suppression) in T_e.