Abstract
The quasi electrostatic modes are investigated in non thermal dusty plasma using non-gyrotropic Kappa distribution in the presence of helical electric field. The Laguerre Gaussian (LG) mode function is employed to decompose the perturbed distribution function and helical electric field. The modified dielectric function is obtained for the dust ion acoustic (DIA) and dust acoustic (DA) twisted modes from the solution of Vlasov-Poisson equation. The threshold conditions for the growing modes is also illustrated.
Highlights
Charged dust particles and dusty plasmas are ubiquitous in cosmic and astrophysical environments (Vladimirov et al, 2005) like interstellar-media, molecular dusty clouds, star forming dust clouds, Eagle nebula, and supernova remnants, our solar system (Mann et al, 2011) such as planetary rings systems and interplanetary media due to the presence of cometary dust particles, Jupiter's dusty rings (Hamilton and Kruger, 2008), cometary nuclei (Patzold et al, 2008) and Earth's mesosphere (Knappmiller et al, 2011)
The three dimensional plots of normalized growth rate γ=ωr are shown for the quasi-electrostatic dust ion acoustic (DIA) and dust acoustic (DA) twisted modes
The quasi-electrostatic DIA and DA twisted modes are investigated in the presence of helical electric field carrying orbital angular momentum
Summary
Charged dust particles and dusty plasmas are ubiquitous in cosmic and astrophysical environments (Vladimirov et al, 2005) like interstellar-media, molecular dusty clouds, star forming dust clouds, Eagle nebula, and supernova remnants, our solar system (Mann et al, 2011) such as planetary rings systems and interplanetary media due to the presence of cometary dust particles, Jupiter's dusty rings (Hamilton and Kruger, 2008), cometary nuclei (Patzold et al, 2008) and Earth's mesosphere (Knappmiller et al, 2011). Notice that Ali et al, 2016 investigated twisted ion acoustic and acoustic waves for dusty plasmas conditions, but restricting to standard Maxwellian distribution to describe the plasma components, and without any drift of the electrons In this manuscript kinetic theory is applied to study the dust ion acoustic and dust acoustic waves in the presence of electric field carrying orbital angular momentum in a plasma containing non-Maxwellian drifted electrons, ions and dust particles described by the generalized Lorentzian or Kappa distribution functions. We though consider the distinct Kappa indices for the electrons, ions and dust particles i.e., κe, κi and κd respectively, which may have some contribution to accomplish the growing modes in quasi-electrostatic dusty plasmas but the role of Lorentzian distributed drifted superthermal electrons is dominant
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