The Plasma Characteristic of Lightning channel
Spectra of lightning return strokes in the range of 390-660nm had been obtained by Slit-less spectrograph. According to the relative intensities and transition parameters of lines, under the model of local thermodynamic equilibrium (LTE), temperatures of lightning channel have been calculated with multiple-line method. Simultaneously, electron density is also obtained by Saha equation. Analysing the changes of electron density and temperature with height of channel, the results show that the channel temperature and the electron density slightly decreases with increasing of height, but at some site, the temperature and the electron density are changed irregularly. Deducing from the radiation characteristics of discharge channel that the pinch point is the main radiant source of X-ray and neutron produced in the process of lighting.
Lightning spectra Channel temperature Electron density
Huaming Zhang Ping Yuan Jie Wang Xiaozhi Shen
College of physics and electronic engineering,Northwest Normal University, Lanzhou 730070, China;.Th College of physics and electronic engineering,Northwest Normal University, Lanzhou 730070, China;Col College of physics and electronic engineering,Northwest Normal University, Lanzhou 730070, China
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）