Ion beam driven ion-acoustic waves in a plasma cylinder with negative ions

Abstract

An ion beam propagating through a magnetized plasma cylinder containing K+ positive ions, electrons, and SF6− negative ions drives electrostatic ion-acoustic (IA) waves to instability via Cerenkov interaction. Two electrostatic IA wave modes in presence of K+ and SF6− ions are studied. The phase velocity of the sound wave in presence of positive and negative ions increase with the relative density of negative ions. The unstable wave frequencies and the growth rate of both the modes in presence of positive and negative ions increase with the relative density of negative ions. The growth rate of both the unstable modes in presence of SF6− and K+ ions scales as the one-third power of the beam density. Numerical calculations of the phase velocity, growth rate, and mode frequencies have been carried out for the parameters of the experiment of Song et al. [Phys. Fluids B 3, 284 (1991)].

Ion beam driven instabilities in unmagnetized and strongly magnetized plasmas

“…Also, in more recent work, a theoretical study has been developed to describe the circularly polarized wave excitation by the ion beam [25]. Furthermore, Sharma et al have investigated the Cherenkov interaction of an ion beam with a magnetized plasma cylinder containing positive and negative ions [26].…”

Low-Frequency Instabilities in the Interaction of Ion Beam With Magnetized Plasma

“…Singh et al have investigated low-frequency electrostatic instabilities driven by an anisotropic ion beam while the beam drift is across [27] and along [28] an external magnetic field. Also, in a recent work, the Cherenkov interaction of an ion beam with negative ions in a cylindrical magnetized plasma has been investigated by Sharma and Gahlot [29].…”

Resonant decay of a Langmuir wave in the presence of dust grains in a cylindrical plasma

“…Electrostatic waves have been investigated with great interest in dusty plasmas in recent years . Barkan et al experimentally observed the variation of the phase velocity with the parameter δ (where δ is the ratio between the ion and electron density) and Landau damping of the ion acoustic (IA) wave.…”