Effects of Photo- and Background Ionization on Positive Streamers

Abstract

Positive streamers need a continued source of free electrons in front of them in order to propagate. Because of the electronegativity of molecular oxygen, free electrons in air quickly attach to oxygen. If this is the case, a high field is needed to detach the electrons. The detached free electrons can form avalanches that feed the front of the streamer… (More)

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