Evaporation of Carbon Atoms and Molecules in Helium by Low-Current Arc Discharge with Graphite Electrodes

Saifutdinov, A. I.; Sorokina, Anastasiia; Boldysheva, V. K.; Latypov, E. R.; Сайфутдинова, А. А.

doi:10.1134/s0018143922060170

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…Thus, in this work, the arc discharge model, which describes the processes in the discharge gap and electrodes in a unified way [ 48 , 49 , 50 , 51 , 52 ], was further developed, taking into account the processes occurring in the discharge gap and in the electrodes in a unified way. In this case, the process of the evaporation of particles from the anode surface was additionally taken into account.…”

Section: Discussionmentioning

confidence: 99%

“…A complete set of plasma-chemical reactions involving atomic and molecular particles of carbon is presented in Table 4 . Previously, this set was considered in [ 52 , 62 ]. In addition, electron dissociation [ 73 ] was taken into account, as well as Penning ionization of carbon atoms and molecules in a discharge with helium.…”

Section: Model Descriptionmentioning

confidence: 99%

“…In addition, electron dissociation [73] was taken into account, as well as Penning ionization of carbon atoms and molecules in a discharge with helium. T/300) 0.5 [52,62] Penning ionization He * + C 2 → C + 2 + He + e 2.9 • 10 −15 (T/300) 0.5 [52,62] Penning ionization He * + C 3 → C + 3 + He + e 2.9 • 10 −15 (T/300) 0.5 [52,62] Penning ionization…”

Section: Kinetics Of Elementary Processes Involving Atoms and Molecul...mentioning

confidence: 99%

“…At present, self-consistent models of arc discharges have been formulated, which describe, in a unified way, the processes occurring in the discharge gap and in electrodes and take into account conjugated effects [ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]. Such models are presented both in one-dimensional and two-dimensional formulations.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Comparative Analysis of Atmospheric Pressure Anodic Carbon Arc Discharge in Argon and Helium–Producing Carbon Nanostructures

Saifutdinov

Тимеркаев

2023

Nanomaterials

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In this work, within the framework of a unified model for the discharge gap and electrodes, a comparative numerical analysis was carried out on the effect of evaporation of graphite anode material on the characteristics of the arc discharge in helium and argon. The effect of changing the plasma-forming ion, in which the ion of evaporated atomic carbon becomes the dominant ion, is demonstrated. For an arc discharge in helium, this effect is accompanied by a jump-like change in the dependence of the current density on voltage (CVC), and smoothly for a discharge in argon. With regard to the dynamics of the ignition of an arc discharge, it is shown that during the transition from glow discharge to arc in helium, the discharge parameters are also accompanied by an abrupt change, while in argon, this transition is smooth. This is due to the fact that the ionization potentials, as well as the ionization cross sections, differ significantly for helium and carbon, and are close in value for helium and argon. For various points on the CVC, the density distributions of the charged and neutral particles of an inert gas and evaporated gases are presented.

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Section: Discussionmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Kinetics Of Elementary Processes Involving Atoms and Molecul...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling and Comparative Analysis of Atmospheric Pressure Anodic Carbon Arc Discharge in Argon and Helium–Producing Carbon Nanostructures

Saifutdinov

Тимеркаев

2023

Nanomaterials

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“…The results exhibited that the temperature distribution predicted by the model was in good agreement with the experimental data, which provided theoretical guidance for the synthesis of metal nanoparticles by arc method. In addition, based on a unified model for the discharge gap and electrodes, Saifutdinov et al [61] performed numerical calculations on the evaporation of carbon atoms and molecules from a graphite electrode to a non-equilibrium He arc plasma. The distribution of carbon atoms, carbon molecules and their ions is given at different discharge current densities.…”

Section: Near-anode Regionmentioning

confidence: 99%

Research progress on numerical simulation of arc discharge plasma process

Zhang,

Yuan,

Ding

et al. 2024

Phys. Scr.

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The arc discharge plasma (ADP) technology has been widely developed in the fields of cutting, welding, spraying and nanomaterials synthesis over the past 20 years. However, during the process of ADP, it is difficult to explain the generation and evolution of arc column, the interaction between arc column and electrodes, as well as the effect of plasma generator structure on the physical characteristics of ADP by experimental means. Therefore, numerical simulation has become an effective mean to explore the physical characteristics of ADP, but also faces severe challenges because it involves multiple physical field coupling, resolution of multiscale features as well as robustness in the presence of large gradients. From the point of view of the construction of ADP mathematical physical models and combined with the practical application of ADP, this paper systematically reviews the researches on physical properties of arc column, near-cathode region, near-anode region as well as the today’s state of the numerical simulation of plasma generators. It provides a good reference for further mastering the physical characteristics of plasma, guiding the industrial application of plasma and optimizing the design of plasma generators. Meanwhile, the relevant computational aspects are discussed and the challenges of plasma numerical simulation in the future are summarized.

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Radiation Plasmodynamic Structures and Spectral Brightness Characteristics of Magneto-Plasma Compressor Discharges

Batrak,

Kopaleishvili

2023

High Energy Chem

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Evaporation of Carbon Atoms and Molecules in Helium by Low-Current Arc Discharge with Graphite Electrodes

Cited by 15 publications

References 34 publications

Modeling and Comparative Analysis of Atmospheric Pressure Anodic Carbon Arc Discharge in Argon and Helium–Producing Carbon Nanostructures

Modeling and Comparative Analysis of Atmospheric Pressure Anodic Carbon Arc Discharge in Argon and Helium–Producing Carbon Nanostructures

Research progress on numerical simulation of arc discharge plasma process

Radiation Plasmodynamic Structures and Spectral Brightness Characteristics of Magneto-Plasma Compressor Discharges

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