Arbitrary amplitude double layers in warm dust kinetic Alfvén wave plasmas

Abstract

Large amplitude electrostatic structures associated with low-frequency dust kinetic Alfvénic waves are investigated under the pressure (temperature) gradient indicative of dust dynamics. The set of equations governing the dust dynamics, Boltzmann electrons, ions and Maxwell’s equation have been reduced to a single equation known as the Sagdeev potential equation. Parameter ranges for the existence of arbitrary amplitude double layers are observed. Exact analytical expressions for the energy integral is obtained and computed numerically through which sub-Alfvénic arbitrary amplitude rarefactive double layers are found to exist.

A study on dust inertial Alfvén solitary waves in a magnetized dust-ion-electron plasma using sagdeev potential method

“…Jukui [28] studied the effect of the finite dust temperature in dust kinetic Alfvén waves. Gogoi and Devi [29] investigated arbitrary amplitude double layers in warm plasma considering Boltzmann distributed ions and electrons and obtained exact analytical expression for the energy integral. Dust kinetic Alfvén solitary and rouge waves in super-thermal dusty plasma were examined by Saini et al [30] using the reductive perturbative technique.…”

“…The previous studies [24][25][26][27][28][29][30][31] do not include the effect of ion inertia, consider finite …”