Fully kinetic simulation of ion acoustic and dust-ion acoustic waves

Jenab, S. M. Hosseini; Kourakis, Ioannis; Abbasi, H.

doi:10.1063/1.3609814

Cited by 23 publications

(19 citation statements)

References 18 publications

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“…In laboratory plasma, these waves have been observed experimentally by Barkan et al. [12][13][14][15][16] In the kinetic description of plasma waves, Landau damping is a fundamental element that is one of the important characteristics of DAW and DIAW and their dynamics. [12][13][14][15][16] In the kinetic description of plasma waves, Landau damping is a fundamental element that is one of the important characteristics of DAW and DIAW and their dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…The values of other physical parameters are q i = q e = 0.9, 10 6 , f = 0.998, Z d = 10 4 , m d /m i = 10 6 , and m i /m e = 1,836Using Equation14 and neglecting the second term for being very small, we find that The values of other physical parameters are q i = q e = 0.9, 10 6 , f = 0.998, Z d = 10 4 , m d /m i = 10 6 , and m i /m e = 1,836Using Equation14 and neglecting the second term for being very small, we find that…”

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confidence: 99%

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Effect of non‐extensivity parameter q on the damping rate of dust ion acoustic waves in non‐extensive dusty plasma

Rehman

Ahmad

Hamza

2018

Contributions to Plasma Physics

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Kinetic theory has been applied to study the damping characteristics of dust ion acoustic waves (DIAWs) in a dusty plasma comprising q-non-extensive distributed electrons and ions, while the dust particles are considered extensive following the Maxwellian velocity distribution function. It is found that the results of the three-dimensional velocity distribution function are more accurate compared to the results of the one-dimensional velocity distribution function. The numerical solution of the dispersion relation is carried out to study the effect of the non-extensivity parameter q on the dispersion, the damping rate, and the range of the values of the normalized wavenumber ( k D ) for which the DIAWs are weakly damped. It is found that the change in the value of the electron non-extensivity parameter q e has a minor effect on the dispersion, the damping rate, and the range of the values of the normalized wavenumber ( k D ) for which the DIAWs are weakly damped, while on the other hand, ion non-extensivity parameter q i has a strong effect on these arguments. The effect of other parameters, such as the ratio of electron to ion number density and ratio of electron to ion temperature, on the damping characteristics of DIAWs is also highlighted.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Effect of non‐extensivity parameter q on the damping rate of dust ion acoustic waves in non‐extensive dusty plasma

Rehman

Ahmad

Hamza

2018

Contributions to Plasma Physics

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“…[28][29][30][31][32] One of the important characteristics of DAWs and DIAWs is the Landau damping, which is a fundamental element in the kinetic description of plasma waves. [28][29][30][31][32] One of the important characteristics of DAWs and DIAWs is the Landau damping, which is a fundamental element in the kinetic description of plasma waves.…”

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confidence: 99%

Kinetic treatment of acoustic waves in a four‐component dusty plasma

Ahmad

Farooq

et al. 2018

Contributions to Plasma Physics

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A kinetic formulation is developed to investigate low-frequency dust ion acoustic waves (DIAWs) and dust acoustic waves (DAWs) as well as numerically for a four-component, collisionless, unmagnetized dusty plasma, using the linearized Vlasov-Poisson model for species obeying the Maxwellian distribution. In particular, the dynamics of low-frequency DIAWs is investigated by considering two cases. In the first case, ions and positive dust particles are assumed to be dynamically adiabatic while the negative dust particles are static in the background. In second case, the ions are taken adiabatic, while both positive and negative dust particles are static in the background. For DAWs, the ions are assumed to be isothermal, while both positive and negative dust species are considered adiabatic. Electrons are assumed to be isothermal in all cases. The linear characteristics and Landau damping rates for DIAWs and DAWs are investigated with effects of the dust particle concentrations and different temperature ratios. It is noted that for higher values of positive dust concentration, DIAWs (DAWs) are less (more) damped. It is also observed that the damping rate increases (decreases) as T i approaches T e for DIAWs (DAWs). It is worth adding here that the theoretical results presented here are supported by numerical analyses and illustrations. The relevance of the study to laboratory and cosmic plasmas is also pointed out. KEYWORDSacoustic waves, dusty plasma, kinetic theory, Landau damping, longitudinal response function INTRODUCTIONA great deal of interest has been shown in the study of dusty plasmas in the last few decades with a view to understanding the propagation of linear and non-linear excitations. Dusty plasmas are very abundant and exist in the laboratory [1,2] as well as in space and astrophysical surroundings [3][4][5][6] such as cometary tails, planetary rings, and the interstellar medium. The existence of a high density of dust grains in a plasma system causes the generation of some complex and collective processes that introduce several new modes, for example, dust acoustic waves (DAWs), [7] dust lattice waves (DLWs), [8,9] , dust drift waves (DDWs), and dust ion acoustic waves (DIAWs).[10] Earlier investigations had been carried out to study the most common dusty plasma system consisting of negative dust particles, ions, and electrons. [7][8][9][10] The main reason for considering the negative dust grain is the fundamental process of charging, that is, the collection of particles with high thermal energy, namely electrons, by the dust grain. However, some new charging mechanisms have been investigated due to which the dust grain can be charged positively. These charging mechanisms are (a) photoemission in the presence of ultraviolet (UV) photons, [11,12] (b) thermionic emission caused by radiative heating, [13] and (c) secondary electron emission from the surface of the dust grains. [14] The co-existence of negatively and positively charged dust grains has been investigated in space [12,14] and laboratory pl...

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“…A fully kinetic approach will be adopted here, by considering a Vlasov equation for each plasma component [2,3,4].…”

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confidence: 99%

“…The dimensional form (2), presented here for brevity, is then rescaled into a set of 3 evolution equations for the pdf's f α (α = e, i, d), via an appropriate normalization (below; details in [2]);…”

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confidence: 99%