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DOI | 10.1002/2017GL075262 |
Laboratory Measurements of X-Ray Emissions From Centimeter-Long Streamer Corona Discharges | |
da Silva, C. L.1; Millan, R. M.1; McGaw, D. G.1; Yu, C. T.1; Putter, A. S.1; LaBelle, J.1; Dwyer, J.2 | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We provide extensive evidence that runaway electron acceleration and subsequent bremsstrahlung X-ray emission are a common feature in negative electrical discharges with voltages as low as 100 kV, indicating that all negative lightning could potentially produce runaway electrons. Centimeter long streamer corona discharges produce bursts of X-ray radiation, emitted by a source highly compact in space and time, leading to photon pileup. Median photon burst energies vary between 33 and 96 keV in 100 kV discharges. Statistical analysis of 5,000+ discharges shows that X-rays are observed in as many as 60% of the triggers, depending on the configuration. X-ray detection is more frequent when streamers are not followed by a spark, the detector is oriented perpendicular to the gap, and a thicker anode is used. In an 8-cm-long gap, X-rays are produced when runaway electrons hit the anode, and the electron acceleration is not necessarily correlated with streamer collisions. Plain Language Summary Small electrical sparks prolifically emit X-rays. These discharges are produced in the lab by electrical energy sources 100 to 1,000 times weaker than what is available in thunderstorms and lightning. Therefore, this is strong evidence that all lightning should produce X-rays and energetic electrons. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900026 |
WOS关键词 | ATMOSPHERIC-PRESSURE ; LIGHTNING LEADERS ; AIR ; RADIATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/25694 |
专题 | 气候变化 |
作者单位 | 1.Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA; 2.Univ New Hampshire, Dept Phys, Durham, NH 03824 USA |
推荐引用方式 GB/T 7714 | da Silva, C. L.,Millan, R. M.,McGaw, D. G.,et al. Laboratory Measurements of X-Ray Emissions From Centimeter-Long Streamer Corona Discharges[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | da Silva, C. L..,Millan, R. M..,McGaw, D. G..,Yu, C. T..,Putter, A. S..,...&Dwyer, J..(2017).Laboratory Measurements of X-Ray Emissions From Centimeter-Long Streamer Corona Discharges.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | da Silva, C. L.,et al."Laboratory Measurements of X-Ray Emissions From Centimeter-Long Streamer Corona Discharges".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
条目包含的文件 | 条目无相关文件。 |
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