Instability of opposite polarity charged dusty plasma with vortex-like distributed electrons

Abstract

Electrons in space plasma may follow vortex-like distribution, that is why we have derived the three-dimentional (3D) nonlinear modified Zakharov–Kuznetsov (mZK), describing the propagation of dust acoustic solitary to the plasma system composed of four components, magnetized charged dust plasma with electrons modelled by vortex-like distribution. By using the reductive perturbation method, it has been found that both solitary wave amplitude and width are affected by the plasma parameters: graim charge ratio ρ, population parameter β, and temperature ratio σ. The small-k perturbation technique has also been applied to study the instability criterion and growth rate of this instability. Cyclotron frequency Ω, temperature ratio [Formula: see text], direction cosine ([Formula: see text] and [Formula: see text]), and grain charge ratio ρ are found to modify the instability growth rate Γ.

Keywords

• DA waves
• mZK equation
• wave instability
• vortex-like electrons