Dynamics of the microstructure of current channels and the generation of high-energy electrons in nanosecond discharges in air
The results of the three-dimensional numerical simulation of the dynamics of the microstructure of high-voltage nanosecond discharges in air at atmospheric pressure are presented. It is established that the fast (at a time of ≈10 ns) broadening and significant decrease in the gas concentration in th...
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Veröffentlicht in: | Physics of atomic nuclei 2015-12, Vol.78 (12), p.1440-1445 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The results of the three-dimensional numerical simulation of the dynamics of the microstructure of high-voltage nanosecond discharges in air at atmospheric pressure are presented. It is established that the fast (at a time of ≈10 ns) broadening and significant decrease in the gas concentration in the microchannels occur as a result of the ohmic heating of microchannels with the diameter of 1–30 μm. It was shown that the broadening of microchannels in a nanosecond diffusive discharge provides an increase in the ratio of the electric field strength to the gas concentration in microchannels to values sufficient for the generation highenergy electron beams and X-ray bremsstrahlung in them. Features of the dynamics of the system of microchannels and its effect on the efficiency of the generation of high-energy electrons in discharges developing in the microstructuring regime of the current channels are considered. |
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ISSN: | 1063-7788 1562-692X |
DOI: | 10.1134/S1063778815120133 |