Propagation characteristics of microwaves in dusty plasmas with multi-collisions

Hong, Yunhai; Yuan, Chengxun; Jia, Jieshu; Gao, Ruilin; Wang, Ying; Zhou, Zhongxiang; Wang, Xiaoou; Li, Hui; Wu, Jian

doi:10.1088/2058-6272/aa5b29

Cited by 15 publications

(8 citation statements)

References 35 publications

(46 reference statements)

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“…When considering the refractive, , and absorption, κ, indices in a dusty plasma, two approaches are a b used. In one of them, expressions for and κ obtained for a particle-free plasma -see formulas (15), (16), (19), and (20) -are used [12,23,[36][37][38]. In this case, the transition to a dusty plasma is performed, by considering the additional frequencies of particle collisions with dust particles (see Section 2.1).…”

Section: Refractive and Absorption Indicesmentioning

confidence: 99%

Specific Features of Microwave Methods for Dusty Plasma Diagnostics. I. Dielectric Permittivity, Refractive and Absorption Indices

Kovtun

Skibenko

et al. 2019

Ukr. J. Phys.

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Two widely used approaches for the determination of the refractive, n, and absorption, ϰ, indices of a dusty plasma have been analyzed. In one of them, the expressions for n and ϰ obtained for a dust-free plasma are used, but the collisions of plasma ions with dust particles are taken into account by means of the collision frequency parameter. In the other approach, the characteristic charging frequency for dust particles is additionally introduced.

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Section: Refractive and Absorption Indicesmentioning

confidence: 99%

Specific Features of Microwave Methods for Dusty Plasma Diagnostics. I. Dielectric Permittivity, Refractive and Absorption Indices

Kovtun

Skibenko

et al. 2019

Ukr. J. Phys.

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“…Prudskikh et al [23] discussed the properties of low-frequency EM waves in a polydisperse dusty plasma environment. Hong et al [24] analyzed the reflection, transmission, and absorption coefficient of microwaves in weakly ionized dusty plasma with multi-collisions. Our group has derived the modified complex dielectric constant in weakly ionized dusty plasma based on the BGK model, calculated the propagation characteristics of EM wave, and discussed the influence of dust parameters on reflection, as well as the transmission coefficient of EM wave.…”

Section: Introductionmentioning

confidence: 99%

Attenuation characteristics of obliquely incident electromagnetic wave in weakly ionized dusty plasma based on modified Bhatnagar–Gross–Krook collision model*

Wang¹,

Guo²,

Li³

2021

Chinese Phys. B

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The attenuation characteristics of obliquely incident electromagnetic (EM) wave in L-Ka frequency band in weakly ionized dusty plasma are analyzed based on the modified Bhatnagar–Gross–Krook (BGK) collision model. According to the kinetic equation and the charging theory, the total complex dielectric constant of the weakly ionized dusty plasma is derived by considering that the minimum velocity of the electron accessible to the dust particle surface is non-zero and the second potential part of the collision cross-section contributes to the charging. The attenuation characteristics within the modified model are compared with those within the traditional model. The influence of the dusty plasma parameters and the incident angle of EM waves on the attenuation in weakly ionized dusty plasma is further analyzed. Finally, the influence of different reentry heights on the attenuation characteristics of the obliquely incident EM wave is discussed. The results show that the effect of the minimum electron velocity and the second term of the collision cross-section on the attenuation characteristics of EM waves cannot be ignored. When the dust density and dust radius are changed, the trends of the attenuation of obliquely incident EM waves are consistent, but the influence of dust density is weaker than that of dust radius due to the constraint of orbit-limited motion (OLM) theory. The plasma thickness, electron density, and incident angle are proportional to the attenuation amplitude of EM waves. The effect of different reentry heights on the attenuation obliquely incident EM waves is related to the electron density and plasma thickness.

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“…[6][7][8][9][10][11][12][13][14][15][16][17][18][19] Sharma et al [20] analysed the non-linear self-modulation of an EM beam in a dusty plasma. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Sharma et al [20] analysed the non-linear self-modulation of an EM beam in a dusty plasma.…”

Section: Introductionmentioning

confidence: 99%

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mentioning

confidence: 99%

Theoretical model for the effect of dust grains on self‐filamentation of a gaussian electromagnetic beam in a fully ionized plasma

Sharma

2018

Contributions to Plasma Physics

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A theoretical model for the effect of dust grains on the self-filamentation of a Gaussian electromagnetic beam propagating in a fully ionized plasma has been developed by employing the energy balance of the plasma constituents, perturbed electron and ion concentrations, and temperature. In this model, neutral atom ionization, re-integration and accumulation of electrons and ions, photoelectric emission of electrons from the surface of dust grains, as well as elastic and charging collisions have also been considered. The effective dielectric constant in the presence of dust grains has been constructed. The effect of temporal growth of dust grains on various plasma parameters for different values of the dust density has been explored. The variation of the beam width with the normalized channel of propagation has been observed for distinct dust densities and dust charge states. It is observed that the non-linearity induced by the effective dielectric constant in the presence of dust grains increases the self-filamentation of the beam, thus enhancing the effective critical power with the dust density. Some of the outcomes of our approach are in line with experimental observations. These outcomes may be useful for explaining space and laboratory plasma experiments as well as for future studies in complex plasmas. KEYWORDScritical power, dusty plasmas, fully ionized plasma, propagation of beam, self-filamentation INTRODUCTIONSeveral investigations [1][2][3][4][5] have been carried out on complex plasmas because of their exclusive characteristics. Especially, self-filamentation has been attracting a lot of of interest in recent years because of the non-linear interaction of an electromagnetic (EM) beam in complex plasmas. Non-linearity appears because of the non-linear radial distribution of the intensity of the beam in complex plasmas and modifies the electron concentration, electron temperature, and dielectric constant. Collisional, relativistic, and ponderomotive non-linearity are the leading factors for carrying out research in the field of plasma applications.Collisional non-linearity appears as a result of heating of the plasma components due to the dissipation of energy of the EM beam propagating through the plasma. The energy gained by the electrons during this process is lost by thermal conduction as well as by electron collisions with ions, dust, and neutral particles. In a fully ionized plasma, the former mechanism becomes predominant because of the higher degree of ionization as 0 ( 2 0 ∕l 2 m ) << 1, where 0 (=2m e /m i ) is the fraction of energy loss due to collisions, m e and m i are the electronic and ionic masses, 0 is the initial width of the beam, and l m is the mean free path of collisions of the electrons.The importance of the subject has been confirmed by various researchers. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Sharma et al. [20] analysed the non-linear self-modulation of an EM beam in a dusty plasma. They measured the non-linear current density and change in the modulation

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Propagation characteristics of microwaves in dusty plasmas with multi-collisions

Cited by 15 publications

References 35 publications

Specific Features of Microwave Methods for Dusty Plasma Diagnostics. I. Dielectric Permittivity, Refractive and Absorption Indices

Specific Features of Microwave Methods for Dusty Plasma Diagnostics. I. Dielectric Permittivity, Refractive and Absorption Indices

Attenuation characteristics of obliquely incident electromagnetic wave in weakly ionized dusty plasma based on modified Bhatnagar–Gross–Krook collision model*

Theoretical model for the effect of dust grains on self‐filamentation of a gaussian electromagnetic beam in a fully ionized plasma

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