Electron density measurement of a lightning stepped leader by oxygen spectral lines

被引：9
|
作者：
Cen, Jianyong [1 ]
Hou, Qiang [1 ]
Yuan, Ping [2 ]
Zhang, Jinjun [1 ]
Sun, Minna [1 ]
Pan, Junxing [1 ]
Cao, Zengli [1 ]
机构：
[1] Shanxi Normal Univ, Coll Phys & Informat Engn, Linfen 041000, Shanxi, Peoples R China
[2] Northwest Normal Univ, Coll Phys & Elect Engn, Key Lab Atom & Mol Phys & Funct Mat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China
来源：
AIP ADVANCES | 2018年 / 8卷 / 08期
基金：
中国国家自然科学基金;
关键词：
SPECTROSCOPY; SPEED;
D O I：
10.1063/1.5042509
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The time-resolved spectrum of a lightning stepped leader in downward process has been obtained by using a slitless spectrograph. Neutral oxygen and nitrogen spectral lines in the near infrared region are observed in the spectra. The electron density of the lightning stepped leader was calculated by using the Stark broadening of the oxygen spectral lines at 777.4 and 844.6 nm. The evolution characteristic of the electron density with time and channel height of the lightning stepped leader was analysed. The results shown that the electron density of the lightning stepped leader was in the order of 1018 cm(-3). The electron density decreased when the lightning stepped leader propagates downward to ground. (C) 2018 Author(s).
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页数：6
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