The effect of charge separation on nonlinearelectrostatic waves in a magnetized dusty plasmawith two-temperature ions

摘要

In view of the observations of parallel (to Earth's magnetic field) spiky electric fieldstructures by the FAST satellite, a theoretical study is conducted using a dusty plasma modelcomprising Boltzmann distributed hot and cool ions, Boltzmann electrons and a negatively chargedcold dust fluid to investigate the existence of similar low frequency nonlinear electrostatic wavesin a dusty plasma which could have a similar appearance as the observed waveforms. Chargeseparation effects are incorporated into our model by the inclusion of Poisson's equation as opposedto assuming quasineutrality. The system of nonlinear equations is then numerically solved. Theresulting electric field structure is examined as a function of various plasma parameters such asMach number, driving electric field amplitude, bulk dust drift speed, particle densities and particletemperatures.