Kinetic study of electrostatic twisted waves instability in nonthermal dusty plasmas

The kinetic theory of electrostatic twisted waves’ instability in a dusty plasma is developed in thepresence of orbital angular momentum of the helical (twisted) electric field in plasmas with kappadistributed electrons, ions, and dust particles. The kappa distributed electrons are considered tohave a drift velocity. The perturbed distribution function and helical electric field are decomposedby Laguerre-Gaussian mode functions defined in cylindrical geometry. The Vlasov-Poisson equationis obtained and solved analytically to investigate the growth rates of the electrostatic twisted waves in a non-thermal dusty plasma. The growth rates of the dust ion acoustic twisted mode (DIATM) and dust acoustic twisted mode (DATM) are obtained analytically and also pictorialpresented numerically. The instability condition for the DIATM and DATM is also discussed with different plasma parameters. The growth rates of DIATM and DATM are larger when the drifted electrons are non-Maxwellian distributed and smaller for the Maxwellian distributed driftedelectrons in the presence of the helical electric field.status: publishe