The structure of an electronegative magnetized plasma sheath with non-extensive electron distribution

Xiu, Zou; Liu, Huiping; Zhu, Yaping; Zhang, Xiaonan; Qiu, Minghui

doi:10.1088/2058-6272/abb3dc

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…Asserghine et al [34] and Zou et al [50] have studied the effect of the nonextensive electrons on the electronegative plasma sheath in the presence of an oblique magnetic field. However, as the focus of both the studies lies on the Debye sheath, they have equated the sheath edge velocities to the Mach number.…”

Section: Theoretical Model and Basic Equationsmentioning

confidence: 99%

Study of a collisionless magnetized plasma sheath with nonextensively distributed species

Paul

Deka

Sharma

et al. 2023

Plasma Sci. Technol.

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A weakly magnetized sheath for a collisionless, electronegative plasma comprisedof positive ions, electrons, and negative ions is investigated numerically using thefluid approach. The electrons are considered to be non-Maxwellian in nature andare described by Tsalli’s distribution. Such electrons have a substantial effect on thesheath properties. The study also reveals that non-Maxwellian distribution is themost realistic description for negative ions in the presence of an oblique magnetic field.In addition to the negative ion temperature, the sheath potential is also affected bythe non-extensive parameters. The present research finds application in the plasmaprocessing and semiconductor industry as well as in space plasmas.

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Section: Theoretical Model and Basic Equationsmentioning

confidence: 99%

Study of a collisionless magnetized plasma sheath with nonextensively distributed species

Paul

Deka

Sharma

et al. 2023

Plasma Sci. Technol.

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“…Therefore, these two types of viscous stresses should be studied together as a unified entity. In previous studies, the electric drift velocity of ions at the sheath edge has commonly been used as the boundary condition for their transverse velocity [24,[38][39][40][41][42]. However, there exists a weak gradient in ion density within the presheath actually.…”

Section: Introductionmentioning

confidence: 99%

Effect of ion stress on properties of magnetized plasma sheath

CHEN 陈,

CUI 崔,

GAO 高

et al. 2024

Plasma Sci. Technol.

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In the plasma sheath, there is a significant gradient in ion velocity, resulting in strong stress on ions treated as a fluid. This aspect has often been neglected in previous sheath studies. This study is based on the Braginskii plasma transport theory and establishes a 1D3V sheath fluid model that takes into account the ion stress effect. Under the assumption that ions undergo both electric and diamagnetic drift in the presheath region, self-consistent boundary conditions, including the ion Bohm velocity, are derived based on the property of the Sagdeev pseudopotential. Furthermore, assuming that the electron velocity at the wall follows a truncated Maxwellian distribution, the wall floating potential is calculated, leading to a more accurate sheath thickness estimation. The results show that ion stress significantly reduces the sheath thickness, enhances ion Bohm velocity, wall floating potential, and ion flux at the wall. It hinders the acceleration of ions within the sheath, leading to notable alterations in the particle density profiles within the sheath. Further research indicates that in ion stress, bulk viscous stress has the greatest impact on sheath properties.

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Total secondary emission effect on the complex plasma sheath with superextensive electrons

Eljabiri,

El Ghani,

Driouch

et al. 2024

J. Plasma Phys.

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This study investigates the dynamics of various particles within the plasma sheath, focusing on the influence of secondary emissions from charged dust particles. The research concentrates on backscattered electron emission (BEE), inelastic reflection emission (IRE) and true-secondary electron emission (TEE) as key contributors to the behaviour of dust particles within the plasma sheath. Employing the semi-empirical model of Furman and Pivi (F-P model), the study defines the total emission of secondary electrons (EES), comprising these three types. The analysis aims to enhance our understanding of the complex interplay between secondary emission phenomena and the dynamics of charged particles within the plasma sheath, contributing valuable insights to the field. Furthermore, a comparative study has been conducted between the results obtained from the emission of secondary electrons according to the Sternglass theory and the emission of secondary electrons obtained using the F-P model. It is observed that the secondary electron emission (SEE) from the dust, based on the F-P model, demonstrates more pronounced effects on the sheath characteristics, particularly when considering lower values of the superextensive electron parameter ‘ $q$ ’.

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The structure of an electronegative magnetized plasma sheath with non-extensive electron distribution

Cited by 4 publications

References 32 publications

Study of a collisionless magnetized plasma sheath with nonextensively distributed species

Study of a collisionless magnetized plasma sheath with nonextensively distributed species

Effect of ion stress on properties of magnetized plasma sheath

Total secondary emission effect on the complex plasma sheath with superextensive electrons

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