Investigation of multi-component magnetized plasma interaction with the carbon surface

Basnet, Suresh; Khanal, Raju

doi:10.1063/1.5109102

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Degree of nonuniformity(%) = B max − B min B max × 100. (31) In this case, the degree of nonuniformity is 21%. These observations lead to question regarding the limit of validity of the homogeneous magnetic field assumption which can be considered as a future work.…”

Section: Resultsmentioning

confidence: 95%

“…Foroutan [28] presented the one-dimensional fluid simulation to investigate the dynamics of an electrostatic sheath for two ion species plasma with dust grains. In recent years, the authors also worked on two ion species plasma in the presence of a uniform oblique magnetic field and collision term using kinetic and fluid models [29][30][31]. Singha et al [32,33] carried out an experiment to study the effect of a non-uniform oblique magnetic field and biasing voltage on presheath and sheath structures.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a non-uniform magnetic field on two ion species plasma-wall transition

Deuja¹,

Basnet²,

Khanal³

2021

Plasma Phys. Control. Fusion

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Fluid theory has been employed to investigate the magnetized plasma-wall transition properties for two ion species plasmas with a uniform background of neutral gas density in the presence of an external magnetic field. The external applied magnetic field is parallel to the surface and its magnitude varies in the direction perpendicular to the surface. The governing equations of ion and electron fluids include ionization and collision with neutral atoms. A comparative study of transition parameters for non-uniform and uniform magnetic fields is performed at equal values of the magnetic flux density at $x = 0$. This study shows that the sheath region shrinks for the non-uniform magnetic field case, essentially in reason of the lower value of the average magnetic field intensity in the plasma-wall transition region. We introduce a figure of merit to quantify the non-uniformity of the magnetic field $(B_{\mathrm{max}}-B_{\mathrm{min}})/B_{\mathrm{max}}$, and show that for its value 0.21 it is possible to model the plasma-wall transition region considering the magnetic field as uniform and equal to its average value. Furthermore, we find that the density distribution of electrons close to the surface deviates from the Boltzmann distribution due to the influence of a strong magnetic field.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effect of a non-uniform magnetic field on two ion species plasma-wall transition

Deuja¹,

Basnet²,

Khanal³

2021

Plasma Phys. Control. Fusion

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“…In previous studies on the properties of the magnetized sheath, the stress tensor in the ion motion equations is often neglected, meaning that the influence of stress on ion motion is not considered [14][15][16][17]. Some studies only consider the effects of thermal pressure and external fields [18][19][20][21][22][23][24][25][26][27]. Generally, when ions enter the sheath, their velocity rapidly increases to several times the ion sound speed under the influence of the electric field.…”

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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Comprehensive study of Kinetic Trajectory Simulation method for multi-component magnetized plasma-wall interaction process

Basnet,

Chalise,

Acharya

et al. 2024

Fundamental Plasma Physics

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Investigation of multi-component magnetized plasma interaction with the carbon surface

Cited by 5 publications

References 21 publications

Effect of a non-uniform magnetic field on two ion species plasma-wall transition

Effect of a non-uniform magnetic field on two ion species plasma-wall transition

Effect of ion stress on properties of magnetized plasma sheath

Comprehensive study of Kinetic Trajectory Simulation method for multi-component magnetized plasma-wall interaction process

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