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- Title
Streamers at the Subnanosecond Breakdown of Argon and Nitrogen in Nonuniform Electric Field at Both Polarities.
- Authors
Beloplotov, D. V.; Lomaev, M. I.; Sorokin, D. A.; Tarasenko, V. F.
- Abstract
An ICCD camera was used to study plasma glow at the stage of the streamer (ionization wave) formation in the tip-plane gap with a length of 3 mm filled with argon or nitrogen at a pressure of 12.5-400 kPa. Positive and negative nanosecond voltage pulses were applied across the gap. Images of streamer were obtained at different time at its propagation along the gap. A streak-camera equipped with a spectrometer was used to measure time evolution of the radiation intensity of nitrogen molecules at a wavelength of 337.1 nm in several regions along the gap at the negative polarity. Average streamer velocity (1.8 cm/ns) was estimated from experimental data at atmospheric pressure of nitrogen. Amplitude-time characteristics of voltage, discharge current and the current of runaway electron beam behind the aluminum-foil anode with a thickness of 10 μm were measured. Reasons for a diffuse discharge under the given experimental conditions were discussed.
- Subjects
ELECTRIC discharges; GLOW discharges; NONUNIFORM plasmas; PLASMA gas research; IONIZATION (Atomic physics); POLARITY (Physics)
- Publication
Technical Physics, 2018, Vol 63, Issue 6, p793
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784218060063