Ionization relaxation in a nonequilibrium pulsed discharge plasma in inert gases and metal vapor

Physics

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Argon Plasma, Electron Plasma, Gas Ionization, Metallic Plasmas, Nonequilibrium Plasmas, Plasma Jets, Cesium Plasma, Electric Pulses, Mercury (Metal), Molecular Relaxation, Plasma Diffusion

Scientific paper

The modified diffusion approximation is used to show that energy lost by electrons in inelastic collisions with atoms is the dominant factor in the plasma energy balance during the growth of ionization when Ne/N(1) is greater than about 0.0001 and Te/(E1-E2) is greater than about 0.05-0.1. An approximate method for calculating these losses is discussed. Relatively simple equations are derived for the time functions Ne(t) and Te(t) during the growth of ionization, and the results are in satisfactory agreement with experimental dependences recorded in argon, or in cesium or mercury-vapor pulsed discharges.

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