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Energetic Radiation from Subsequent-Stroke Leaders: The Role of Reduced Air Density in Decayed Lightning Channels
| Content Provider | MDPI |
|---|---|
| Author | Kereszy, Istvan Rakov, Vladimir Czumbil, Levente Muresan, Alexandru Ding, Ziqin Micu, Dan Cooray, Vernon |
| Copyright Year | 2022 |
| Description | Leaders of subsequent strokes in negative cloud-to-ground lightning are known to produce X-ray/gamma-ray emissions detectable at distances of a few kilometers or less from the lightning channel. These leaders usually develop in decayed but still warm channels of preceding strokes. We computed electric field waveforms at different points along the path of subsequent leader as those points are traversed by the leader tip. For a typical subsequent leader, the electric field peak is a few MV/m, which is sufficient for production of energetic radiation in a warm (reduced air density) channel. We examined the dependence of electric field peak on the leader model input parameters, including the prospective return-stroke peak current (a proxy for the leader tip potential) and leader propagation speed, and compared model predictions with measurements. |
| Starting Page | 7520 |
| e-ISSN | 20763417 |
| DOI | 10.3390/app12157520 |
| Journal | Applied Sciences |
| Issue Number | 15 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-26 |
| Access Restriction | Open |
| Subject Keyword | Applied Sciences Lightning Channel Lightning Leader Model Electric Field X-rays/gamma-rays |
| Content Type | Text |
| Resource Type | Article |
