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   Articles with "streamer" as a keyword



Analyses of electron runaway in front of the negative streamer channel

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recommendations! Published in 2017 at "Journal of Geophysical Research"

DOI: 10.1002/2017ja023917

Abstract: X-and γ-ray emissions, observed in correlation with negative leaders of lightning and long sparks of high-voltage laboratory experiments, are conventionally connected with the bremsstrahlung of high-energy runaway electrons (REs). Here we extend a focusing mechanism,… read more here.

Keywords: ionization wave; channel; electron runaway; streamer ... See more keywords
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Numerical Simulation of Streamer Physics in Nanosecond Pulsed Surface Discharges

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recommendations! Published in 2021 at "International Journal of Aeronautical and Space Sciences"

DOI: 10.1007/s42405-021-00349-z

Abstract: Two-dimensional numerical simulations of a nanosecond pulsed single dielectric barrier discharge (SDBD) are performed in air. Streamers produced in nanosecond SDBDs have filamentary properties and generate a strong electric field and high-density gradient of charged… read more here.

Keywords: physics; non equilibrium; streamer; electric field ... See more keywords

Fluid modeling of radical species generation mechanism in dense methane-air mixture streamer discharge

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recommendations! Published in 2018 at "Physics of Plasmas"

DOI: 10.1063/1.5016855

Abstract: Atmospheric dielectric barrier discharge (DBD) was found to be promising in the context of plasma chemistry, plasma medicine, and plasma-assisted combustion. In this paper, we present a detailed fluid modeling study of abundant radical species… read more here.

Keywords: fluid modeling; dense methane; discharge; radical species ... See more keywords

Modeling of streamer dynamics in helium plasma jets driven by modulated voltage pulses

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recommendations! Published in 2019 at "Physics of Plasmas"

DOI: 10.1063/1.5115779

Abstract: The results of simulation of guided streamers driven by modulated voltage pulses are presented. It is shown that, in qualitative accordance with recently obtained experimental data, modulation of the applied voltage can lead to oscillations… read more here.

Keywords: voltage pulses; plasma; modulated voltage; streamer ... See more keywords

Streamer propagation characteristics of nanosecond pulsed discharge plasma on fluidized particles surface: experimental investigation and numerical simulation

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recommendations! Published in 2024 at "Journal of Physics D: Applied Physics"

DOI: 10.1088/1361-6463/ad33f8

Abstract: Plasma fluidized-bed contributes to strengthening the interaction between active species in plasma and fluidized powder particles, resulting in higher active species utilization efficiency and superior powders processing/modification performance. However, the plasma streamer dynamics on the… read more here.

Keywords: streamer; fluidized particles; discharge; active species ... See more keywords

Streamer properties and associated x-rays in perturbed air

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recommendations! Published in 2018 at "Plasma Sources Science and Technology"

DOI: 10.1088/1361-6595/aaa5d8

Abstract: Streamers are ionization waves in electric discharges. One of the key ingredients of streamer propagation is an ambient gas that serves as a source of free electrons. Here, we explore the dependence of streamer dynamics… read more here.

Keywords: streamer properties; air; streamer; perturbed air ... See more keywords
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The effect of the stochasticity of photoionization on 3D streamer simulations

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recommendations! Published in 2019 at "Plasma Sources Science and Technology"

DOI: 10.1088/1361-6595/ab1331

Abstract: Positive streamer discharges require a source of free electrons ahead of them for their growth. In air, these electrons are typically provided by photoionization. Here we investigate how stochastic fluctuations due to the discreteness of… read more here.

Keywords: photoionization; positive streamers; amount photoionization; stochasticity photoionization ... See more keywords
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Statistical analysis on branching characteristics of positive streamer discharges in N2–O2 mixtures

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recommendations! Published in 2024 at "Plasma Sources Science and Technology"

DOI: 10.1088/1361-6595/ad37bf

Abstract: Streamers are fast-propagating ionization channels that can usually branch and form complex tree-like structures in dielectric media. In this paper, we perform experiments on positive streamers in different N2–O2 mixtures under varying conditions including voltage,… read more here.

Keywords: average branching; streamer; statistical analysis; analysis branching ... See more keywords

Simulation on the effect of oxygen concentration on the positive secondary streamer generated in oxygen-rich nitrogen–oxygen mixtures under atmospheric pressure

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recommendations! Published in 2024 at "Plasma Sources Science and Technology"

DOI: 10.1088/1361-6595/ad5932

Abstract: In this study, we investigated the effect of various O2 concentrations, from 20% to 90%, in nitrogen–oxygen ( N2/O2 ) mixtures on the characteristics of secondary streamers. As oxygen molecules have different molecular characteristics from… read more here.

Keywords: oxygen concentration; oxygen; secondary streamer; streamer ... See more keywords

Macroscopic parameterization of positive streamer heads in air

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recommendations! Published in 2024 at "Plasma Sources Science and Technology"

DOI: 10.1088/1361-6595/adaf53

Abstract: The growth of streamer discharges is determined at their heads, for individual streamers as well as in collective phenomena, such as streamer trees or coronas or streamer bursts ahead of lightning leaders. Some properties of… read more here.

Keywords: heads air; field; streamer; velocity ... See more keywords

Cloudlet Capture Model for the Accretion Streamer onto the disk of DG Tau

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recommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae338

Abstract: DG Tau is a nearby T Tauri star associated with a collimated jet, a circumstellar disk and a streamer a few hundred au long. The streamer connects to the disk at ∼50 au from DG… read more here.

Keywords: disk tau; accretion streamer; disk; streamer onto ... See more keywords