Effects of non‐extensive electrons on the sheath of dusty plasmas with variable dust charge

Ghani, O. El; Driouch, I.; Chatei, Hassan

doi:10.1002/ctpp.201900030

Cited by 25 publications

(15 citation statements)

References 65 publications

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“…Here we focus on the average collision frequencies in the nonequilibrium complex plasmas with non-Maxwellian and/or power-law velocity distributions which exist widely in astrophysical and space plasmas [21][22][23][24][25][26][27][28][29][30]. The non-Maxwellian and/or power-law distributed complex plasmas have aroused wide interest and have generally been studied under the framework of new statistical mechanics [31].…”

Section: Introductionmentioning

confidence: 99%

The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics

Wang,

2021

Preprint

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We study the collision frequencies of particles in the weakly and highly ionized plasmas with the power-law q-distributions in nonextensive statistics. We derive the average collision frequencies of neutral-neutral particle, electron-neutral particle, ion-neutral particle, electron-electron, ion-ion and electron-ion, respectively, in the q-distributed plasmas. We show that the average collision frequencies depend strongly on the q-parameter in a complex form and thus their properties are significantly different from that in Maxwell-distributed plasmas. These new average collision frequencies are important for us to study accurately the transport property in the complex plasmas with non-Maxwell/power-law velocity distributions.

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Section: Introductionmentioning

confidence: 99%

The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics

Wang,

2021

Preprint

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“…However, related to the problem of the sheath formation in non-stationary plasmas, some authors attempted to include the effects of a non-Maxwellian distribution function by two temperature Maxwellian distributions (Foroutan & Akhoundi 2012b;Ou et al 2013;Driouch, Chatei & Bojaddaini 2015) and a q non-extensive electron distribution (Safa, Ghomi & Niknam 2014;Hatami 2015;Driouch & Chatei 2017;Borgohain & Saharia 2018a,b;Ghani, Driouch & Chatei 2019), where q is the parameter which represents the degree of nonextensivity. Since a Druyvesteyn-type function for the electrons is the actual distribution in a plasma discharge, in the present work we take into account the Druyvesteyn-type distribution for electrons and study the plasma sheath structure.…”

Section: Introductionmentioning

confidence: 99%

The effects of electron energy distribution function on the plasma sheath structure in the presence of charged nanoparticles

Khalilpour

Foroutan

2020

J. Plasma Phys.

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The effects of the electron energy distribution function (EEDF) on the structure of a dusty plasma sheath are investigated. Here, it is assumed that the electrons obey a Druyvesteyn-type distribution with a parameter $x$ controlling the shape of the EEDF. The Druyvesteyn-like distribution tends to a Maxwellian distribution as $x$ varies from 2 to 1. Using the orbital motion limited theory, the incident electron current on the dust is evaluated for a given $x$ . The results of numerical simulations are compared with those of a Maxwellian distribution. It was found that the sheath dynamics depends strongly on the magnitude of $x$ . The sheath thickness increases monotonically with increasing $x$ . However, the absolute dust charge decreases and, as a result, the accelerating ion drag force is weakened and thus the dust number density is enhanced. For a plasma with a Druyvesteyn-like distribution, the Bohm speed is a function of $x$ and increases with increasing $x$ .

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“…Recently, non‐extensive statistics has been widely applied to study the properties of the power‐law‐distributed complex plasmas, including waves, instabilities, and dust charging . The transport processes of charged particles in the power‐law‐distributed complex plasmas have also been studied.…”

Section: Introductionmentioning

confidence: 99%

Heat conductivity and Dufour effect in the weakly ionized, magnetized, and kappa‐distributed plasma

Xia

2020

Contributions to Plasma Physics

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By using the generalized Boltzmann equation of transport and the first‐order approximation of Chapman‐Enskog expansion on the κ‐distribution function, we study the thermal conductivity and Dufour effect in the weakly ionized and magnetized plasma. We show that the thermal conductivity and Dufour coefficient in the κ‐distributed plasma are significantly different from those in the Maxwell‐distributed plasma, and the transverse thermal conductivity and Dufour coefficient in the κ‐distributed plasma are generally greater than those in the Maxwell‐distributed plasma, and the Righi‐Leduc coefficient and Hall Dufour coefficient in the κ‐distributed plasma are also generally greater than those in the Maxwell‐distributed plasma.

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Effects of non‐extensive electrons on the sheath of dusty plasmas with variable dust charge

Cited by 25 publications

References 65 publications

The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics

The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics

The effects of electron energy distribution function on the plasma sheath structure in the presence of charged nanoparticles

Heat conductivity and Dufour effect in the weakly ionized, magnetized, and kappa‐distributed plasma

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