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Title: Catastrophic instabilities of modified DA-DC hybrid surface waves in a semi-bounded plasma system

Abstract

We find the catastrophic instabilities and derive the growth rates for the dust-cyclotron resonance (DCR) and dust-rotation resonance (DRR) modes of the modified dust-acoustic and dust-cyclotron (DA-DC) hybrid surface waves propagating at the plasma–vacuum interface where the plasma is semi-bounded and composed of electrons and rotating dust grains. The effects of magnetic field and dust rotation frequency on the DCR- and DDR-modes are also investigated. We find that the dust rotation frequency enhances the growth rate of DCR-mode and the effect of dust rotation on this resonance mode decreases with an increase of the wave number. We also find that an increase of magnetic field strength enhances the DCR growth rate, especially, for the short wavelength regime. In the case of DRR-mode, the growth rate is found to be decreased less sensitively with an increase of the wave number compared with the case of DCR, but much significantly enhanced by an increase of dust rotation frequency. The DRR growth rate also decreases with an increase of the magnetic field strength, especially in the long wavelength regime. Interestingly, we find that catastrophic instabilities occur for both DCR- and DRR-modes of the modified DA-DC hybrid surface waves when the rotational frequency ismore » close to the dust-cyclotron frequency. Both modes can also be excited catastrophically due to the cooperative interaction between the DCR-mode and the DRR-mode.« less

Authors:
 [1];  [2]
  1. Department of Physics and Research Institute for Natural Sciences, Hanyang University, Seoul 04763 (Korea, Republic of)
  2. Department of Applied Physics and Department of Bionanotechnology, Hanyang University, Ansan, Kyunggi-Do 15588, South Korea and Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180-3590 (United States)
Publication Date:
OSTI Identifier:
22598978
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CYCLOTRON FREQUENCY; CYCLOTRON RESONANCE; CYCLOTRONS; DUSTS; INSTABILITY; INTERFACES; MAGNETIC FIELDS; PLASMA; ROTATING PLASMA; SURFACES; WAVE PROPAGATION; WAVELENGTHS

Citation Formats

Lee, Myoung-Jae, and Jung, Young-Dae, E-mail: ydjung@hanyang.ac.kr. Catastrophic instabilities of modified DA-DC hybrid surface waves in a semi-bounded plasma system. United States: N. p., 2016. Web. doi:10.1063/1.4954153.
Lee, Myoung-Jae, & Jung, Young-Dae, E-mail: ydjung@hanyang.ac.kr. Catastrophic instabilities of modified DA-DC hybrid surface waves in a semi-bounded plasma system. United States. doi:10.1063/1.4954153.
Lee, Myoung-Jae, and Jung, Young-Dae, E-mail: ydjung@hanyang.ac.kr. 2016. "Catastrophic instabilities of modified DA-DC hybrid surface waves in a semi-bounded plasma system". United States. doi:10.1063/1.4954153.
@article{osti_22598978,
title = {Catastrophic instabilities of modified DA-DC hybrid surface waves in a semi-bounded plasma system},
author = {Lee, Myoung-Jae and Jung, Young-Dae, E-mail: ydjung@hanyang.ac.kr},
abstractNote = {We find the catastrophic instabilities and derive the growth rates for the dust-cyclotron resonance (DCR) and dust-rotation resonance (DRR) modes of the modified dust-acoustic and dust-cyclotron (DA-DC) hybrid surface waves propagating at the plasma–vacuum interface where the plasma is semi-bounded and composed of electrons and rotating dust grains. The effects of magnetic field and dust rotation frequency on the DCR- and DDR-modes are also investigated. We find that the dust rotation frequency enhances the growth rate of DCR-mode and the effect of dust rotation on this resonance mode decreases with an increase of the wave number. We also find that an increase of magnetic field strength enhances the DCR growth rate, especially, for the short wavelength regime. In the case of DRR-mode, the growth rate is found to be decreased less sensitively with an increase of the wave number compared with the case of DCR, but much significantly enhanced by an increase of dust rotation frequency. The DRR growth rate also decreases with an increase of the magnetic field strength, especially in the long wavelength regime. Interestingly, we find that catastrophic instabilities occur for both DCR- and DRR-modes of the modified DA-DC hybrid surface waves when the rotational frequency is close to the dust-cyclotron frequency. Both modes can also be excited catastrophically due to the cooperative interaction between the DCR-mode and the DRR-mode.},
doi = {10.1063/1.4954153},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = 2016,
month = 6
}
  • The dispersion relation for modified dust ion-acoustic surface waves in the magnetized dusty plasma containing the rotating dust grains is derived, and the effects of magnetic field configuration on the resonant growth rate are investigated. We present the results that the resonant growth rates of the wave would increase with the ratio of ion plasma frequency to cyclotron frequency as well as with the increase of wave number for the case of perpendicular magnetic field configuration when the ion plasma frequency is greater than the dust rotation frequency. For the parallel magnetic field configuration, we find that the instability occursmore » only for some limited ranges of the wave number and the ratio of ion plasma frequency to cyclotron frequency. The resonant growth rate is found to decrease with the increase of the wave number. The influence of dust rotational frequency on the instability is also discussed.« less
  • The dispersion relation for a dust ion-acoustic (DIA) surface wave is kinetically derived for the semi-bounded Lorentzian plasma containing elongated and rotating charged dust particles. The DIA surface wave frequency is found to be decreased as the dust rotational frequency increases.
  • Dust ion-acoustic surface waves propagating on the interface between a vacuum and a semi-bounded Lorentzian (kappa) plasma are kinetically investigated. For a collisionless and unmagnetized Lorentzian plasma, the dispersion relation shows that dust ion-acoustic surface modes are stable against small linear perturbation. The damping rates of the Lorentzian waves are generally increased as the superthermal particles are increased. The ion-to-electron density ratio also greatly enhances the damping rate. As the wave number becomes large, the damping of the wave is quickly decreased. The effects of superthermal particles and dust particles on the phase and the group velocities are discussed inmore » this work as well.« less
  • High-frequency electromagnetic surface waves (SWs) in a weakly ionized plasma half-space with Maxwellian electrons are studied taking into account elastic electron-neutral collisions. The SWs spectrum and damping rate are obtained numerically for a wide range of wavelengths, and the asymptotes of damping rate are analytically calculated in some limits. It is shown that the high-frequency SWs become strongly damped at wavelengths {lambda}<{lambda}{sub Min}, where {lambda}{sub Min} significantly depends on plasma parameters (e.g., electron temperature and electron and neutral atom density). The relative importance of collisional and Cherenkov (collisionless) damping of SWs is investigated and is graphically shown for a rangemore » of plasma parameters and SW wavelengths. The behavior of weakly ionized plasma with respect to the SW propagation has been recovered for the collisional parameter {eta}.« less