Electrostatic ion waves in non-Maxwellian pair-ion plasmas

Kashif Arshad,S Mahmood

doi:10.1063/1.3520060

Abstract

The electrostatic ion waves are studied for non-Maxwellian or Lorentzian distributed unmagnetized pair-ion plasmas. The Vlasov equation is solved and damping rates are calculated for electrostatic waves in Lorentzian pair-ion plasmas. The damping rates of the electrostatic ion waves are studied for the equal and different ion temperatures of pair-ion species. It is found that the Landau damping rate of the ion plasma wave is increased in Lorentzian plasmas in comparison with Maxwellian pair-ion plasmas. The numerical results are also presented for illustration by taking into account the parameters reported in fullerene pair-ion plasma experiments.

Highlights

During this decade, theoretical study of pair-ionPIplasma has gained attraction due to stable production of fullerene ion plasmas in the laboratory experiments.[1–3] The dynamics of symmetric or PI plasma is different from the usual electron-ion plasma in which both fast and slow time scales occur due to difference in masses of ions and electrons
IAW can be derived from linear theory of two fluid plasma dynamics provided the temperature difference between the same mass ion species exist
It has been reported that a difference in temperature exists between two fullerene ion species which occurs due to different charging processes, i.e., the electron impact ionization and attachment for the production of both positive and negative of fullerene ions in PI plasmas.[2]

Summary

Introduction

Theoretical study of pair-ionPIplasma has gained attraction due to stable production of fullerene ion plasmas in the laboratory experiments.[1–3] The dynamics of symmetric or PI plasma is different from the usual electron-ion plasma in which both fast and slow time scales occur due to difference in masses of ions and electrons. The kappa distributions have been used by a number of authors to study the damping rates of the electrostatic and electromagnetic waves in plasmas.

Results

Conclusion