نتایج جستجو برای: dust acoustic wave

تعداد نتایج: 330408  

Journal: interface and thin films 2017

Based on quantum hydrodynamics theory (QHD), the propagation of nonlinear quantum dust-ion acoustic (QDIA) solitary waves in a ‎collision-less, unmagnetized four component quantum plasma consisting of electrons, positrons, ions and stationary negatively charged ‎dust grains with dust charge variation is investigated using reductive perturbation method. The charging current to the dust grains ca...

In this paper, the acoustic wave propagation in multilayer Thue-Morse structures has theoretically been studied. The composing layers were assumed do be Cu, Al, Mgo and Pb materials. Two, three or four different materials have been used in a typical structure. By using a perpendicular incident acoustic wave, the transmission coefficient was calculated and then by its old, the frequency gaps was...

Journal: :Galaxies 2021

In this work, the modulational instability of dust-acoustic (DA) waves (DAWs) is theoretically studied in a four-component plasma medium with electrons, positrons, ions, and negative dust grains. The nonlinear dispersive coefficients Schrödinger equation (NLSE) are used to recognize stable unstable parametric regimes DAWs. It can be seen from numerical analysis that amplitude DA rogue decreases...

Journal: :Physics of Fluids 2023

Laser or electromagnetic radiation, in general, interacts with plasma very interesting ways. In most cases, they induce orbital angular momentum (OAM) such plasmas due to their polarization effects. Dust-ion-acoustic waves (DIAWs) immovable dust particles are studied the effect of rotation produced laser interaction. The electrons considered non-Maxwellian limit, inertial ions and static grains...

2005
S. I. Popel T. V. Losseva A. P. Golub R. L. Merlino S. N. Andreev

Dust ion-acoustic shocks in a Q machine device are considered. For their description the so-called hydrodynamic ionization source model is used. The model is appropriate for the description of the laboratory experiments in a Q machine device and contains the most important basic mechanisms responsible for the formation of the dust ion-acoustic shocks. A comparative analysis of various dissipati...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
M Rosenberg G J Kalman P Hartmann J Goree

In a plasma containing charged dust grains, the dust acoustic instability (DAI) can be driven by ions streaming through the dust with speed less than the ion thermal speed. When the dust is strongly coupled in the liquid phase, the dispersion relation of the dust acoustic modes changes in a way that leads to an enhancement of the growth rate of the DAI. In this paper, we show how strong couplin...

2005
Amar P. Misra

A linear theory of dust acoustic (DA) and dust ion-acoustic (DIA) waves in a self-gravitating collisional dusty plasma contaminated by variable-charge impurities is presented for a self-consistent closed system. The ion-drag force arising from the ion orbital motion as well as momentum transfer from all the ions and self-gravitation are taken into consideration. The physical processes, viz., du...

2016
K. Quest M. Dutreix

Dust acoustic (or dust density) waves have been observed in many laboratory dusty plasmas. These low-frequency waves involve the dynamics of highly charged and massive dust grains, and can be excited by the flow of ions relative to dust. In this paper, we consider the nonlinear development of the dust acoustic instability, excited by thermal ion flow, in a collisional plasma containing dust wit...

2010
A. A. MAMUN P. K. SHUKLA

The basic features of dusty plasmas, particularly basic characteristics of dust in a plasma, and typical dusty plasma parameters for different space and laboratory plasma conditions, are presented. The complexity and the diversity of the field of dusty plasma physics are briefly discussed. Theoretical and experimental discoveries of linear and nonlinear features of waves, particularly dust-ion-...

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