Transport mechanisms of metastable and resonance atoms in a gas discharge plasma

摘要: Atoms in electronically excited states are of significant importance a large number different gas discharges. The spatio-temporal distribution particularly the lower states, metastable and resonance ones, influences overall behavior plasma because their role ionization energy budget. This article is review theoretical experimental studies on spatial formation temporal evolution atoms weakly ionized low-temperature plasmas. Therefore, transport mechanisms due to collisional diffusion radiation compared step by step. differences structures plasmas attributed these mechanisms. analysis performed obtaining solutions equations. Solutions stationary non-stationary problems decomposition over eigenfunctions corresponding operators showed that there is, one hand, an effective suppression highest modes and, other survival modes. illustrated examples. In addition, Green functions for discussed. Numerical methods simultaneous solution balance equations proposed. calculations consider absorption coefficients according Lorentz contour spectral line. Measurements distributions reviewed larger discharge conditions, i.e. positive column plasma, afterglow constricted pulsed discharge, stratified magnetron with cathode spot.