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- W4323864105 abstract "A voltage-driven cathode sheath model in an atmospheric-pressure argon arc discharge is developed in the framework of an implicit particle-in-cell Monte Carlo collision (PIC–MCC) method. Plasma transport processes are solved numerically in one dimension without any local-equilibrium hypotheses, in particular, without explicitly dividing sheath and a quasi-neutral plasma region. The right boundary of the computational domain located at the pre-sheath is determined first by observing the variation in typical parameters. A comparison of results is given with different positions of the right boundary to study the plasma transport processes in the cathode sheath. Number densities, spatially averaged energies, electric field and potential, collision frequency, heating rate of electrons, as well as the spatially averaged electron energy probability function inside the sheath, are predicted self-consistently based on this newly developed kinetic model. It is shown that both excitation collisions and ionization collisions occur inside the sheath, and collision frequency of the former is larger than the latter. The collision frequency of charge exchange is higher than that of elastic collision for ions. In addition, the effects of different electron emission processes are described. It is indicated that the thermionic emission on the hot cathode surface is not the only significant emission mechanism to sustain the arc discharges." @default.
- W4323864105 created "2023-03-11" @default.
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- W4323864105 date "2023-03-01" @default.
- W4323864105 modified "2023-10-16" @default.
- W4323864105 title "Studies on plasma transport processes in the cathode sheath of atmospheric direct-current arc discharge with particle-in-cell and Monte Carlo collision simulation" @default.
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- W4323864105 doi "https://doi.org/10.1063/5.0131304" @default.
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