Study of electron waves in electrical discharge channels

摘要: The fast luminous pulses experimentally observed to propagate in electrical discharge channels, and believed have a significant role the process of breakdown, are investigated, using plasma fluid approach. These fall two regimes characterized by different average velocities 106 108 m/s. We concentrate on lower velocity pulses. A nondimensional analysis is used show that these waves can be considered as longitudinal electron driven pressure gradients weakly ionized plasmas. Model equations derived considering each additional term momentum equation small but finite perturbation. In all cases, standard nonlinear model obtained possible solutions. Electric forces lead Korteweg‐deVries equation, viscosity Burgers electron‐neutral collisions damped wave equation. propagation attenuation along preionized channels naturally associated with formatio...