Numerical simulation of plasma of large-dimensions produced by injecting electron beam into air

Li, Hong; Tie, Su; Liang, Ouyang; Wang, Huihui; Chen, Zhipeng; Liu, Wandong

doi:10.7498/aps.55.3506

Acta Phys. Sin.

2006

DOI: 10.7498/aps.55.3506

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Numerical simulation of plasma of large-dimensions produced by injecting electron beam into air

Hong Li¹,

Su Tie²,

Ouyang Liang³

et al.

Abstract: A four-species 1-D hybrid numerical model was set up to simulate the process of formation of large-dimension plasma produced by injecting electron beams into air. It showed that plasma of the order of 0.5m in length and 1012cm-3 in density can be produced by an electron beam with the energy of 140keV and flux of 50mA/cm2. The effect of space charge associated with the beam on the beam propagation and related process vanishes soon after the plasma is produced. The beam flux is directly relevant to the plasma de… Show more

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Cited by 7 publications

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Two-dimensional numerical simulation of a continuous needle-like argon electron-beam plasma

Chen

Liu

2017

Physics of Plasmas

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The fluid-Poisson equations coupled with the Monte Carlo method were used to simulate the spatio-temporal behavior of a needle-like argon electron-beam plasma. Based on the Monte Carlo simulation, three coupled parameters characterizing the electron beam propagation for initial energies above several keV were expressed using a universal dimensionless shape function given in terms of the beam range multiplied by a normalized coefficient. Therefore, a single run of the Monte Carlo code was sufficient for the simulations over a wide range of conditions. The spatial potential as a function of space and time was studied from the fluid-Poisson equations. The results indicate that the time evolution of the spatial potential was influenced by the presence of the slowed-down electrons and the flying beam electrons, whereas the potential in quasi-equilibrium was mainly determined from the spatial distribution of the secondary electron. The potential in quasi-equilibrium was positive near the beam entrance and most negative along the tip of the beam range, which was a result of ambipolar diffusion. When the enclosing boundary surfaces were moved within the beam range, the potential was nearly positive everywhere. The calculation on the diffusion-drift flux indicated that the net current of the secondary electrons flowing back to the incident plane in quasi-equilibrium balanced the incident beam current, which was the so-called return current in the three-dimensional space.

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Two-dimensional numerical simulation of a continuous needle-like argon electron-beam plasma

Chen

Liu

2017

Physics of Plasmas

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Scaling relations for a needle-like electron beam plasma from the self-similar behavior in beam propagation

Chen

Liu

et al. 2017

Physics of Plasmas

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Scaling relations of the main parameters of a needle-like electron beam plasma (EBP) to the initial beam energy, beam current, and discharge pressures are presented. The relations characterize the main features of the plasma in three parameter space and can provide great convenience in plasma design with electron beams. First, starting from the self-similar behavior of electron beam propagation, energy and charge depositions in beam propagation were expressed analytically as functions of the three parameters. Second, according to the complete coupled theoretical model of an EBP and appropriate assumptions, independent equations controlling the density and space charges were derived. Analytical expressions for the density and charges versus functions of energy and charge depositions were obtained. Finally, with the combination of the expressions derived in the above two steps, scaling relations of the density and potential to the three parameters were constructed. Meanwhile, numerical simulations were used to test part of the scaling relations.

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Characteristics of the plasma produced by the energetic electron beam in sub-atmospheric pressure

Wang

et al. 2021

AIP Advances

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Numerical simulation of plasma of large-dimensions produced by injecting electron beam into air

Cited by 7 publications

References 0 publications

Two-dimensional numerical simulation of a continuous needle-like argon electron-beam plasma

Two-dimensional numerical simulation of a continuous needle-like argon electron-beam plasma

Scaling relations for a needle-like electron beam plasma from the self-similar behavior in beam propagation

Characteristics of the plasma produced by the energetic electron beam in sub-atmospheric pressure

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