Методом теневого фотографирования обнаружена микроканальная структура искрового разряда в воздухе атмосферного давления в промежутке острие−плоскость, наблюдаемая с момента появления свечения разряда. Зарегистрирована динамика микроструктуры на временах от единиц до десятков наносекунд, включающая развитие микроканалов от острия вглубь разрядного промежутка, ветвление, расширение микроканалов и их взаимодействие. Установлена корреляция микроструктур искрового канала в разрядном промежутке и ег о автографа на поверхности плоского электрода.
The formation of the microchannel structure of a spark discharge in the gap spike (cathode)-plane of 1.5 mm length in the air of atmospheric pressure was studied by the method of shadow photography.
The images with the concurrent descent of microchannel diameter sand the number of microchannel increase in the cathode region on the time interval of 5 ns were recorded. The obtained data are explained in the frames of the microstructure formation mechanism at the expense of the front instability of the ionization wave. The parameters characterizing the process of the microstructure formation are estimated, and they agree with the experimental data.
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