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DOI | 10.1002/2017JD027157 |
Radio Frequency Electromagnetic Radiation From Streamer Collisions | |
Luque, Alejandro | |
2017-10-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:19 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | We present a full electromagnetic model of streamer propagation where the Maxwell equations are solved self-consistently together with electron transport and reactions including photoionization. We apply this model to the collision of counter-propagating streamers in gaps tens of centimeters wide and with large potential differences of hundreds of kilovolts. Our results show that streamer collisions emit electromagnetic pulses that, at atmospheric pressure, dominate the radio frequency spectrum of an extended corona in the range from about 100 MHz to a few gigahertz. We also investigate the fast penetration, after a collision, of electromagnetic fields into the streamer heads and show that these fields are capable of accelerating electrons up to about 100 keV. By substantiating the link between X-rays and high-frequency radio emissions and by describing a mechanism for the early acceleration of runaway electrons, our results support the hypothesis that streamer collisions are essential precursors of high-energy processes in electric discharges. Plain Language Summary Long electric discharges such as a lightning stroke simultaneously produce bursts of X-rays and radio frequency noise. Here we present a numerical model that explains this coincidence by attributing both phenomena to the collisions of counter-propagating conducting filaments called streamers. |
英文关键词 | streamers high-energy atmospheric physics radio frequency FDTD |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413675900018 |
WOS关键词 | PHOTOIONIZATION ; SIMULATION ; SPARKS ; AIR |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32549 |
专题 | 气候变化 |
作者单位 | CSIC, IAA, Granada, Spain |
推荐引用方式 GB/T 7714 | Luque, Alejandro. Radio Frequency Electromagnetic Radiation From Streamer Collisions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(19). |
APA | Luque, Alejandro.(2017).Radio Frequency Electromagnetic Radiation From Streamer Collisions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(19). |
MLA | Luque, Alejandro."Radio Frequency Electromagnetic Radiation From Streamer Collisions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.19(2017). |
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