On the Problem of Critical Electric Field of Atmospheric Air
| Autor: | Alexey A. Emelyanov, Vitaly Yu. Klimashov, D. I. Iudin, Fedor D. Iudin, Artem Syssoev |
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| Rok vydání: | 2021 |
| Předmět: |
Atmospheric Science
Ozone Materials science Dielectric strength small gas components lightning initiation Electron Environmental Science (miscellaneous) Lightning Computational physics chemistry.chemical_compound Impact ionization Altitude breakdown electric field chemistry Meteorology. Climatology Electric field detachment QC851-999 Physics::Atmospheric and Oceanic Physics Water vapor |
| Zdroj: | Atmosphere, Vol 12, Iss 1046, p 1046 (2021) Atmosphere Volume 12 Issue 8 |
| ISSN: | 2073-4433 |
| DOI: | 10.3390/atmos12081046 |
| Popis: | It is traditionally accepted to define the dielectric strength of air as an electric field corresponding to the balance between the rates of impact ionization and electrons’ attachment to neutrals. Its reduced value is known to be about 110 Td regardless of the altitude above the mean sea level. In this study, the altitude profile of the critical electric field of atmospheric air in the 0–40 km altitude range is specified. Unlike the conventional approach, a wide range of additional plasma-chemical processes occurring in atmospheric air, such as electron detachment from negative ions and ion-ion conversion is taken into account. Atmospheric air is considered to be a mixture of N2:O2 = 4:1 containing a small amount of chemically active small gas components, such as water vapor, atomic oxygen, ozone, and several types of nitrogen oxides. It is shown that the dielectric strength of air falls noticeably compared to its conventional value. The results of the study can be important to solve the problems of initiation and propagation of lightning discharges, blue starters, and blue jets. |
| Databáze: | OpenAIRE |
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