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Effect of Secondary Electron Emission on Argon Glow Discharge Characteristics
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Abstract
The present work develops and tests a computationally model of a DC glow discharge in low pressure argon gas of collisionless electron plasma. In this work, we have chosen the fluid model described by a series of partial differential equations representing all the physical phenomena that occur in a landfill. Using these differential equations, the spatial distribution of electrons, electron mean energy and electric field distribution in the inter-electrode space of DC plasma discharge have been calculated by the finite differences method according to the exponential scheme. Argon is used as the working gas to investigate all the physical processes occurring in the glow discharge. We especially investigate the effect of the secondary emission of electrons from the electrode surface. We have performed a classification of the value of the secondary emission coefficient γ and the model was validated using the value of γ according to plasma potential. The value of γ has been shown to affects electric field behavior in the plasma sheaths.
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