Computational study of plasma sheath interaction

Hromádka, Jakub; Ibehej, Tomas; Hrach, R.

doi:10.1088/0031-8949/2014/t161/014068

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coupling between the sheath of a planar electrode and the sheath of a cylindrical probe has already been experimentally observed and compared with particle-in-cell simulations (Barnat and Hebner 2007). In this article we would like to extend our previous work (Hromadka et al 2014) to the conditions of electronegative plasma.…”

Section: Introductionmentioning

confidence: 78%

Computer modelling of electronegative plasma sheaths and their mutual interaction

Hromádka¹,

Ibehej²,

Hrach³

2015

Phys. Scr.

View full text Add to dashboard Cite

Our paper focuses on investigation of sheath structures formed in the vicinity of biased solid objects immersed in electronegative plasma. In Particular, phenomena during mutual interaction of several plasma sheaths were investigated. Our results show the manner in which the sheath of a cylindrical probe is affected by the presence of another cylindrical probe with smaller radius in its surroundings. Number density of charged particles, electric field intensity and fluxes of charged particles on the probes were observed to quantify the mutual interaction of sheaths. The study was done by means of the 2D particle-in-cell model with Monte Carlo treatment of collisions.

show abstract

Section: Introductionmentioning

confidence: 78%

Computer modelling of electronegative plasma sheaths and their mutual interaction

Hromádka¹,

Ibehej²,

Hrach³

2015

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Indeed, the positive space charge is responsible to maintain the plasma potential. Understanding the space charge formation and its mechanism is necessary for plasma surface interaction as well as plasma diagnostics such as of Langmuir probe [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Space charge formation and Bohm’s criterion in the edge of thermal electronegative plasma

Yasserian

Aslaninejad

2016

J Theor Appl Phys

View full text Add to dashboard Cite

The collisional electronegative plasma space charge is investigated in the presence of the thermal positive ions. The Boltzmann distribution is assumed for electrons and negative ions and fluid equations are used to treat the accelerated positive ion through the sheath region. The influence of the positive ion temperature on the profile of the space charge is obtained for different negative ion concentration and negative ion temperature for collisionless and collisional cases. It is shown that the position of the space charge peak is independent of positive ion temperature while its amplitude depends on the positive ion temperature. The presence of the negative ion leads to damping of the space charge amplitude. In addition the thermal effect of the positive ion on the kinetic energy of the ion extracted from an ion source is studied in difference of collisionality and electronegativity. It is shown that, in the presence of thermal positive ion, the influence of the negative ion temperature on the sheath characteristics disappears. It is observed that in the presence of the hot positive ion, the twofold feature of the space charge starts at higher values of negative ion temperature which is more pronounced in collisional case. Finally, the influences of the positive and negative ion temperature, as well as the electronegativity and collisionality on the net electric current are studied.

show abstract

Self-consistent one dimension in space and three dimension in velocity kinetic trajectory simulation model of magnetized plasma-wall transition

Chalise

Khanal

2015

Physics of Plasmas

View full text Add to dashboard Cite

We have developed a self-consistent 1d3v (one dimension in space and three dimension in velocity) Kinetic Trajectory Simulation (KTS) model, which can be used for modeling various situations of interest and yields results of high accuracy. Exact ion trajectories are followed, to calculate along them the ion distribution function, assuming an arbitrary injection ion distribution. The electrons, on the other hand, are assumed to have a cut-off Maxwellian velocity distribution at injection and their density distribution is obtained analytically. Starting from an initial guess, the potential profile is iterated towards the final time-independent self-consistent state. We have used it to study plasma sheath region formed in presence of an oblique magnetic field. Our results agree well with previous works from other models, and hence, we expect our 1d3v KTS model to provide a basis for the studying of all types of magnetized plasmas, yielding more accurate results.

show abstract

Computational study of plasma sheath interaction

Cited by 3 publications

References 5 publications

Computer modelling of electronegative plasma sheaths and their mutual interaction

Computer modelling of electronegative plasma sheaths and their mutual interaction

Space charge formation and Bohm’s criterion in the edge of thermal electronegative plasma

Self-consistent one dimension in space and three dimension in velocity kinetic trajectory simulation model of magnetized plasma-wall transition

Contact Info

Product

Resources

About