Ion plasma waves in dusty plasmas: Halley's comet

We investigate ion waves in a plasma in the presence of massive charged dust particles, a common space-plasma component now known to exist also in planetary rings and comets. We derive an equation describing low-frequency electrostatic perturbations on a non-homogeneous background, where the inhomogeneity is due to a distribution of charged grains, each surrounded by an equilibrium statistical distribution of plasma particles. This model is then applied to propose an interpretation of some recent data from the Vega and Giotto space probes to Halley's comet the increase of the low-frequency electrostatic noise (ion-acoustic waves) in the region of increased dust.

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Nonlinear Dust Acoustic Waves in Strongly Coupled Dusty Plasmas with Positively Charged Dust Particles

Communications in Theoretical Physics ◽

10.1088/0253-6102/65/2/247 ◽

2016 ◽

Vol 65 (2) ◽

pp. 247-253 ◽

Cited By ~ 2

Author(s):

Yun-Liang Wang ◽

Xiao-Yan Guo ◽

Quan-Shui Li

Keyword(s):

Acoustic Waves ◽

Dusty Plasmas ◽

Dust Particles ◽

Charged Dust ◽

Dust Acoustic Waves ◽

Strongly Coupled ◽

Dust Acoustic ◽

Positively Charged

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Proparyation of Low frequency microwave in dusty Plasma

Baghdad Science Journal ◽

10.21123/bsj.5.3.374-378 ◽

2008 ◽

Vol 5 (3) ◽

pp. 374-378

Author(s):

Baghdad Science Journal

Keyword(s):

Dusty Plasma ◽

Acoustic Waves ◽

Coupling Parameter ◽

Low Frequency ◽

Dust Particles ◽

Ion Acoustic Waves ◽

Electrostatic Waves ◽

Wave Dynamics ◽

Special Cases ◽

Low Frequency Waves

The numerical simulation for the low frequency waves in dusty plasma has been studied. The studying was done by taking two special cases depending on the direction of the propagation of the wave:First, when the propagation is parallel to the magnetic field K//B,this mode is called acoustic mode.Second,when K B this mode is called cyclotron mode.In addition, every one of the two modes divided into two modes depending on the range of the frequency.The Coulomb coupling parameter was studied, with temperature T,density of the dust particles Nd ,and the charge of the particle Qd.The low frequency electrostatic waves in dusty grains were studied. Also, the properties of ion-acoustic waves and ion-cyclotron waves are shown to modify even through the dust grains do not participate in the wave dynamics. If the dust dynamics induced in the analysis, new “ dust modes “ appear.

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Resonant electromagnetic wave mixing in a dusty plasma

Journal of Plasma Physics ◽

10.1017/s0022377800018900 ◽

1996 ◽

Vol 55 (3) ◽

pp. 349-358 ◽

Cited By ~ 2

Author(s):

Jin-Xiu Ma ◽

M. Y. Yu ◽

P. K. Shukla

Keyword(s):

Acoustic Waves ◽

Electromagnetic Waves ◽

Phase Conjugation ◽

Four Wave Mixing ◽

Dusty Plasmas ◽

Wave Mixing ◽

Ion Acoustic Waves ◽

Charge Fluctuations ◽

Dust Charge ◽

Dust Charge Fluctuations

Wave mixing resulting from the resonance of electromagnetic waves with ion acoustic waves modified by dust charge fluctuations is investigated. The corresponding nonlinear susceptibilities are derived and applied to the study of phase conjugation by four-wave mixing. It is shown that dust charge fluctuations can lead to a filling-up of the resonance-induced splitting of the phase-conjugate reflectivity, making the latter a useful tool for the diagnostics of dusty plasmas.

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Plasma cavity formation caused by ion acoustic waves and nonlinear modulation of trapped waves

Journal of Plasma Physics ◽

10.1017/s0022377899007564 ◽

1999 ◽

Vol 61 (3) ◽

pp. 489-505

Author(s):

T. HONZAWA ◽

S. WATANABE ◽

Y. SAITOU

Keyword(s):

Acoustic Waves ◽

Early Stage ◽

Cavity Formation ◽

Pressure Gradients ◽

Trapped Waves ◽

Ion Acoustic Waves ◽

Ion Acoustic ◽

Nonlinear Modulation ◽

Ion Waves ◽

The Waves

Externally amplitude-modulated ion acoustic waves with high frequencies of 200–320 kHz are experimentally shown to form plasma cavities and to be trapped in them at an early stage. Thereafter, the trapped waves are observed to suffer nonlinear modulation and create new lower-frequency waves with average frequencies as low as 20–40 kHz within the cavities. As a result, the externally excited high-frequency ion acoustic waves are found to be nonlinearly converted into lower-frequency ion waves in the cavities. Finally, the pressure gradients of the waves effective in cavity formation and nonlinear modulation of the trapped waves are discussed.

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Determination of wave growth from measured distribution functions and transport theory

Journal of Plasma Physics ◽

10.1017/s0022377800022170 ◽

1980 ◽

Vol 23 (1) ◽

pp. 91-113 ◽

Cited By ~ 75

Author(s):

C. T. Dum ◽

E. Marsch ◽

W. Pilipp

Keyword(s):

Acoustic Waves ◽

Transport Theory ◽

Low Frequency ◽

Distribution Functions ◽

Ion Acoustic Waves ◽

Wave Growth ◽

Ion Cyclotron Waves ◽

Precise Shape ◽

The Magnetic Field

A stability analysis which directly uses particle distribution functions determined from experiments or transport theory, rather than model distributions, is carried out. The features of distribution functions relevant to whistlers, ion cyclotron waves, including their low-frequency extensions for propagation along the magnetic field, and to ion-acoustic waves are analyzed in detail. The dependence of wave growth on the precise shape of the distributions and the numerical feasibility of the method is demonstrated by the use of measured solar wind distributions.

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