Kinetic theory studies of linear instabilities in space plasmas



Using kinetic theory, linear instabilities associated with the propagation of low and high frequency waves that depend on ion and electron dynamics will be investigated in the context of plasmas which occur in the magnetosphere (magnetic field region) of Earth. The resonant interactions of these waves with ion and/or electron beams (which are directed parallel to and/or anti-parallel to the magnetic field direction) are important for the amplification of the waves, which, ultimately, leads to the formation of nonlinear wave structures. The mentioned instabilities are important contributors to different parts of the spectrum of broadband electrostatic noise which is found to be a common occurrence in the space plasma regions that are within the magnetosphere of Earth.