The plasma parameter of a positive column in a transverse magnetic field

Kaneda, Teruo

doi:10.1088/0022-3727/12/1/008

Cited by 8 publications

(8 citation statements)

References 19 publications

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“…The conclusions obtained from the analysis of figure 2 are well confirmed by figure 4, which represents calculated and measured values of the electron mean energy at discharge axis ε(0), as a function of NR, for the same axial currents as in figure 2. In figure 4, and for comparison purposes, the (overestimated) calculated curves were divided by a factor of 2, thus approaching the experimental values reported by Kaneda [80] and by Sato [81]. Note the significant dispersion in the experimental data presented in this figure.…”

Section: Resultssupporting

confidence: 68%

“…Note the significant dispersion in the experimental data presented in this figure. As in figure 2, simulations clearly deviate from the measurements of [80] at high pressures, but this trend is not confirmed by the measurements of [81].…”

Section: Resultsmentioning

confidence: 67%

“…For E z /N = 1.30 × 10 −16 V cm −2 (corresponding to NR = 1.93 × 10 17 cm −2 ) and ε(0) = 6.60 eV (which gives k I 2.80 × 10 −13 cm 3 s −1 and u k 4.46 eV), we have = 0.37 cm (see equations ( 34) and ( 36)), in contrast with the typical ambipolar characteristic length a = 0.42 cm (for a zero electron density at discharge wall) (see equation (37) at R = 1). Figure 2 plots also E z /N versus NR, as measured by Kaneda [80] at I dc = 30 mA. In general, the model seems to overestimate the values of the maintenance field with respect to measurements, particularly at high pressures, which is most probably due to the fact that stepwise excitation and ionization mechanisms were not considered.…”

Section: Resultsmentioning

confidence: 95%

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Fluid modelling of the positive column of direct-current glow discharges

Alves¹

2007

Plasma Sources Sci. Technol.

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This paper presents a tutorial on the fluid modelling of the positive column of direct-current cylindrical glow discharges. The model writes the continuity and momentum-transfer equations for electrons and ions, coupled with Poisson's equation and the electron mean energy transport equations. The model is solved for helium at pressures p 0.1-10 Torr, gas temperature T g = 500 K, discharge currents I dc = 5-200 mA, and tube radius R = 1 cm. The electron transport parameters and rate coefficients are calculated using the local mean energy approximation in articulation with a two-term Boltzmann solver. Model equations are integrated from the discharge axis to the wall, passing through the space-charge sheath and monitoring the charge separation within it. The results obtained allow a systematic characterization of discharge energy deposition and space-charge sheath formation, as a function of pressure and axial current. A general good agreement is found between model results and experimental measurements available in the literature.

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 95%

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Fluid modelling of the positive column of direct-current glow discharges

Alves¹

2007

Plasma Sources Sci. Technol.

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“…The curves are calculations for I DC =50 mA (solid line) and 200mA (dashed). The points are measurements of Kaneda [74] for I DC =30 mA. Reproduced from [74].…”

Section: Structure and Examplesmentioning

confidence: 99%

Section: Structure and Examplesmentioning

confidence: 99%

Foundations of modelling of nonequilibrium low-temperature plasmas

Alves

Bogaerts

Guerra

et al. 2018

Plasma Sources Sci. Technol.

118

120

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This work explains the need for plasma models, introduces arguments for choosing the type of model that better fits the purpose of each study, and presents the basics of the most common nonequilibrium low-temperature plasma models and the information available from each one, along with an extensive list of references for complementary in-depth reading. The paper presents the following models, organised according to the level of multi-dimensional description of the plasma: kinetic models, based on either a statistical particle-in-cell/Monte-Carlo approach or the solution to the Boltzmann equation (in the latter case, special focus is given to the description of the electron kinetics); multi-fluid models, based on the solution to the hydrodynamic equations; global (spatially-average) models, based on the solution to the particle and energy rate-balance equations for the main plasma species, usually including a very complete reaction chemistry; mesoscopic models for plasma-surface interaction, adopting either a deterministic approach or a stochastic dynamical Monte-Carlo approach. For each plasma model, the paper puts forward the physics context, introduces the fundamental equations, presents advantages and limitations, also from a numerical perspective, and illustrates its application with some examples. Whenever pertinent, the interconnection between models is also discussed, in view of multi-scale hybrid approaches.

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Non-Uniform Axial Electric Field in Argon Glow Discharge Plasma

Akbar¹,

Bilikmen²

2006

Chinese Phys. Lett.

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The plasma parameter of a positive column in a transverse magnetic field

Cited by 8 publications

References 19 publications

Fluid modelling of the positive column of direct-current glow discharges

Fluid modelling of the positive column of direct-current glow discharges

Foundations of modelling of nonequilibrium low-temperature plasmas

Non-Uniform Axial Electric Field in Argon Glow Discharge Plasma

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