Efeitos da densidade eletrônica na geração de harmônicos eletrostáticos via interação feixe-plasmas

Abstract

In this work we investigate the approach of electrostatic harmonics emission in space plasmas. Computer simulations were performed to investigate the non-linear interaction of multiple electron beams, with di erent densities, with a background plasma. For our simulations we have used a one-dimensional particle code, KEMPO 1D (Kyoto university's ElectroMagnetic Particle cOde), in a modi ed version to support multiples electron beams. In the rst chapters of this work we presents a review of the phenomena associated with type III solar bursts and the description of the KEMPO code as well as the equations (in discrete form) that describe the behavior of particles and elds. To anticipate, our results shown an approach of electrostatic harmonics. This approach is related with the density of the second electron beam. Also, our results have shown an intensi cation of the electrostatic harmonic emission after we introduce into simulation the second electron beam with density greater than the rst beam.