Study of nonlinear 3-D evolution of kinetic Alfvén wave and fluctuation spectra

摘要: Waves and instabilities play a very crucial role in astrophysical plasmas e.g. solar wind, Geospace etc. The main objective of current study is to investigate the importance nonlinear processes associated with kinetic Alfven waves (KAWs) order understand physical mechanism behind magnetopause turbulence. Numerical simulation coupled equations guiding dynamics three dimensionally propagating wave (KAW) slow magnetosonic has been performed for intermediate beta plasma (i.e. \(m_{e}/m_{i} \ll \beta < 1\), where \(\beta\) thermal magnetic pressure ratio) applicable magnetopause. A simplified semi-analytical model based on paraxial approach also developed. We have examined field localization power spectrum 3-D this interaction. Governing dynamical KAW get when ponderomotive force arising due pump taken into account while studying dynamics. numerical prediction law scaling just consistent observation THEMIS spacecraft