V. F. Tarasenko, N. P. Vinogradov, V. A. Panarin, V. S. Skakun, D. A. Sorokin, E. Kh. Baksht
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Abstract
Plasma diffuse jets (PDJs) generating in low-pressure air are experimentally studied. We consider them as a laboratory model of column red sprites. It has been established that red-colored radiation of a positive column of a glow discharge is superimposed on streamer radiation in a PDJ with an increase in the discharge current duration. The positive column in some cases can consist of periodic bright regions. Based on the experimental results, an explanation is suggested for the following phenomena observed in red columnar sprites: (1) the emergence of a region with a brighter luminescence (“glow”) in the upper part of the column sprites; (2) the appearance of bright dots (“beads”) after the passage of the front of the first streamers forming the column sprites.
期刊介绍：
Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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