Streamers at the Subnanosecond Breakdown of Argon and Nitrogen in Nonuniform Electric Field at Both Polarities
| Autor: | Mikhail I. Lomaev, Dmitry V. Beloplotov, Victor F. Tarasenko, D. A. Sorokin |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Argon Materials science Physics and Astronomy (miscellaneous) Atmospheric pressure стримеры chemistry.chemical_element Plasma Nanosecond 01 natural sciences 010305 fluids & plasmas Wavelength chemistry Ionization Electric field аргон 0103 physical sciences Cathode ray Atomic physics азот субнаносекундный пробой |
| Zdroj: | Technical physics. 2018. Vol. 63, № 6. P. 793-800 |
| ISSN: | 1090-6525 1063-7842 |
| DOI: | 10.1134/s1063784218060063 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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