Nonlinear interaction of 3D kinetic Alfvén wave and whistler wave in solar wind plasmas

Nonlinear interaction between highly oblique whistler wave and ion acoustic wave pertinent to magnetopause has been investigated. The density perturbation in whistler wave is supposed to be originated due to the presence of ion acoustic wave in the background. The ponderomotive force components arising due to the high amplitude pump wave, viz., whistler wave are constituted in the nonlinear dynamics of low frequency ion acoustic wave. The coupled nonlinear dynamical equations are then modelled in the form of modified nonlinear Schrödinger equation by considering adiabatic response of low frequency ion acoustic wave. The numerical simulation of this coupled nonlinear equation is performed to study the temporal evolution of nonlinear whistler wave. The obtained simulation results show that the temporal evolution also leads to the cascade of broadband turbulence spectrum at smaller wavelengths. The relevance of the obtained results with the observations of THEMIS spacecraft in the magnetopause region has been pointed out.

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Localization and implication of oblique whistler wave in the magnetopause region

Nandal

Yadav

Sharma

2016

Physics of Plasmas

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Spatiotemporal nonlinear evolution of the laser pulse and turbulence generation in laser produced plasmas

et al. 2022

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This study presents a model to understand the behavior of the turbulence generated in the magnetic field of mega gauss order during high-intensity laser interaction with magnetized plasma. The modified nonlinear Schrödinger (MNLS) equation is developed by contemplating the effect of the group velocity dispersion, diffraction, and nonlinearity induced by the relativistic variation of electron mass and the nonlinear ponderomotive force. Numerical simulation is carried out to solve the dimensionless MNLS equation. The simulation results show the generation of the solitary wave type coherent structures in the nonlinear spatiotemporal evolution of the laser pulse at the early stage, but subsequent turbulence generation has also been observed. The ensemble-averaged turbulent power spectrum has been studied and the power-law scaling is approximately ∼ [Formula: see text](a solid red line of scaling [Formula: see text] is given for reference). To get insight into the spatiotemporal nonlinear development of the laser pulse, while propagating in the plasma medium, a semi-analytical model has also been presented. The present study could be substantial in replicating astrophysical scenarios by laboratory simulations along with understanding the underlying quintessential physics of magnetic turbulence.

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Nonlinear interaction of 3D kinetic Alfvén wave and whistler wave in solar wind plasmas

Cited by 2 publications

References 69 publications

Localization and implication of oblique whistler wave in the magnetopause region

Localization and implication of oblique whistler wave in the magnetopause region

Spatiotemporal nonlinear evolution of the laser pulse and turbulence generation in laser produced plasmas

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