DOI: 10.1002/2014GL061163
论文题名: Modeling of X-ray emissions produced by stepping lightning leaders
作者: Xu W. ; Celestin S. ; Pasko V.P.
刊名: Geophysical Research Letters
ISSN: 0094-9665
EISSN: 1944-9396
出版年: 2014
卷: 41, 期: 20 起始页码: 7406
结束页码: 7412
语种: 英语
英文关键词: ground radiation
; lightning
; stepped leader
; stepping process
; terrestrial gamma ray flashes
; X-rays
Scopus关键词: Clouds
; Electric discharges
; Electric fields
; Electromagnetic wave emission
; Lightning
; Rockets
; Spectroscopy
; X ray optics
; X ray scattering
; X rays
; Bremsstrahlung emission
; Inhomogeneous electric fields
; Photon energy spectrum
; Potential dependence
; Stepped leader
; Terrestrial Gamma ray Flashes
; Triggered lightning
; X-ray energy spectrum
; Gamma rays
; cloud to ground lightning
; electric field
; gamma ray radiation
; numerical model
; physical property
; prediction
; temperature effect
; X-ray
英文摘要: Intense and brief bursts of X-ray emissions have been measured during the stepping process of both natural cloud-to-ground (CG) and rocket-triggered lightning flashes. In this paper, we investigate theoretically the energy spectra of X-rays produced by the bremsstrahlung emission of thermal runaway electrons accelerated in the inhomogeneous electric field produced around lightning leader tips. The X-ray energy spectrum depends on the physical properties of the associated lightning leaders. Consequently, X-ray measurements can be used for diagnostics of the electrical properties of lightning stepped leaders. We report simulation results of the photon energy spectra produced by 5 and 10 MV negative CG lightning discharges that would be measured from the ground using ideal detectors. We also quantify theoretically the radial dependence of X-ray energy spectra received at ground level during the leader stepping process. Moreover, it is found that the ground radiation generated in this process is harmless to humans. Key Points Predictions on energy spectra of X-rays produced by stepping lightning leadersRadial and electric potential dependence of X-ray spectra measured at the groundUsing X-ray bursts to evaluate the electrical properties of lightning leaders ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911377892&doi=10.1002%2f2014GL061163&partnerID=40&md5=d018ddc67ec2e2a3aadbd05317bbf514
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6929
Appears in Collections: 气候减缓与适应
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作者单位: Communications and Space Sciences Laboratory, Department of Electrical Engineering, Pennsylvania State University, University Park, PA, United States
Recommended Citation:
Xu W.,Celestin S.,Pasko V.P.. Modeling of X-ray emissions produced by stepping lightning leaders[J]. Geophysical Research Letters,2014-01-01,41(20).