Observation of the glow structure of positive streamers in carbon dioxide | Izvestiya vuzov. Fizika. 2025. № 12. DOI: 10.17223/00213411/68/12/15

Observation of the glow structure of positive streamers in carbon dioxide

Various glow zones of a streamer head formed under conditions of an apokampic discharge in carbon dioxide at pressures of 3 to 12 Torr and propagating at a velocity of ~ 2∙107 cm∙s-1 were detected. Time-resolved optical diagnostics revealed that the streamer head consists of the main brightly glowing zone and a preceding weakly glowing zone, which we previously called a precursor. The time lag between the zones is several nanoseconds. It is assumed that the precursor glow corresponds to the region of uncompensated positive ion charge and is located in the vicinity of the streamer front, where the electric field strength reaches its maximum value. The main brightly glowing zone corresponds to the streamer body. The facts found should be used to make additions to the cathode-directed streamer model.

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Keywords

air, carbon dioxide, apokampic discharge, nitrogen, streamer, ionization wave

Authors

Name	Organization	E-mail
Beloplotov Dmitry V.	Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences	dv.beloplotov@hcei.ru
Skakun Victor S.	Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences	vs.skakun@hcei.ru
Sosnin Eduard A.	Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences; Tomsk State University	ea.sosnin@hcei.ru
Panarin Victor A.	Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences	va.panarin@hcei.ru
Sorokin Dmitry A.	Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences; Tomsk State University	da.sorokin@hcei.ru

Всего: 5

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