Kinetic trajectory simulation method for the multi-component magnetized plasma sheath

Basnet, Suresh; Khanal, Raju

doi:10.1088/1361-6587/ab1708

Cited by 7 publications

(9 citation statements)

References 31 publications

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“…A fundamental element of KTS is to trace the particle trajectories in the phase space to discover the related ion velocity distribution functions. In order to trace the trajectories, the simulation region is discretized and the ion equation of motion is solved in a time-centered manner [28][29][30]. An initial potential distribution and particle distributions are taken as input to the iteration and the governing kinetic and the Maxwell equations are solved self-consistently for prescribed boundary conditions.…”

Section: Kinetic Model and Basic Equationsmentioning

confidence: 99%

Kinetic simulation of an electronegative plasma with a cut-off distribution and modified Bohm criterion

Basnet¹,

Khanal²

2019

Plasma Sci. Technol.

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A kinetic simulation model has been employed to study the properties of an electronegative magnetized plasma sheath assuming the cut-off distribution of electrons and negative ions. The fundamental kinetic Bohm condition for the electronegative magnetized plasma has paramount importance for the formation of a stationary plasma sheath near the material wall. The presence of an oblique magnetic field in an electronegative plasma affects the ion distribution at the plasma injection side and at the wall. The temperature profile of negative charged particles has a non-uniform distribution, which determines the energy flow towards the wall.

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Section: Kinetic Model and Basic Equationsmentioning

confidence: 99%

Kinetic simulation of an electronegative plasma with a cut-off distribution and modified Bohm criterion

Basnet¹,

Khanal²

2019

Plasma Sci. Technol.

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“…modified and extended in studying different magnetized plasma sheath problems [3,[12][13][14][15]. S. Farhad and M. Khoramabadi [16] studied the properties of the collisional magnetized sheath with two species of positive ions by using the fluid model.…”

Section: Modelmentioning

confidence: 99%

“…The behavior of plasma at material wall of a container is always a fascinating event which is one of the olderst problems in plasma [1] and is still not fully understood [2][3][4][5][6][7]. A thin layer that is formed close to a wall facing plasma and has sharp gradients is known as the plasma sheath.…”

Section: Introductionmentioning

confidence: 99%

Effect of Permittivity of Plasma Medium on the Particle Properties and Electric Field in a Magnetized Plasma Sheath

2022

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The plasma sheath, a thin layer having sharp gradients, is necessary to be formed at any material wall in exposure with plasma for its stability. Characteristics of magnetized plasma sheath formed in front of a material wall for different permittivity of plasma medium has been studies using the kinetic trajectory simulation (KTS) model. The electron density, ion density, electric field and potential decreases on moving away from the sheath entrance but total charge density increases. As plasma is composed of charged particles, any variation in the permittivity of the medium has significant effects on the sheath properties. It is found that on increasing the permittivity of the medium, the electric potential strength and hence electric field decreases because of increased shielding ability of the plasma. The results are in qualitative agreement with earlier studies based on the fluid approach but the kinetic approach is more accurate quantitatively providing a better perception of plasma-wall transition phenomena.

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“…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%

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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Kinetic trajectory simulation method for the multi-component magnetized plasma sheath

Cited by 7 publications

References 31 publications

Kinetic simulation of an electronegative plasma with a cut-off distribution and modified Bohm criterion

Kinetic simulation of an electronegative plasma with a cut-off distribution and modified Bohm criterion

Effect of Permittivity of Plasma Medium on the Particle Properties and Electric Field in a Magnetized Plasma Sheath

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

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