The study on the characteristics and particle densities of lightning discharge plasma
文献类型：期刊论文
| 作者 | Wang Jie1; Yuan Ping1,2; Zhang Hua-ming1; Shen Xiao-zhi1 |
| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 28期号:9页码:2003-2008 |
| 关键词 | particle density pressure ionization degree |
| ISSN号 | 1000-0593 |
| DOI | 10.3964/j.issn.1000-0593(2008)09-2003-06 |
| 通讯作者 | Yuan Ping(yuanp@nwnu.edu.cn) |
| 英文摘要 | According to the wavelengths, relative intensities and transition parameters of lines in cloud-to-ground lightning Spectra obtained by a slit-less spectrograph in Qinghai province and Xizang municipality, and by theoretical calculations of plasma, the average temperature and electron density for individual lightning discharge channel were calculated, and then, using Saha equations, electric charge conservation equations and particle conservation equations, the particle densities of every ionized-state, the mass density, pressure and the average ionization degree were obtained. Moreover, the average ionization degree and characteristics of particle distributions in each lightning discharge channel were analyzed. Local thermodynamic equilibrium and an optically thin emitting gas were assumed in the calculations. The result shows that the characteristics of lightning discharge plasma have strong relationships with lightning intensities. For a certain return stroke channel, both temperatures and electron densities of different positions show tiny trend of falling away with increasing height along the discharge channel. Lightning channels are almost completely ionized, and the first ionized particles occupy the main station while N Pi has the highest particle density. On the other hand, the relative concentrations of N Pi and O Pi are near a constant in lightning channels with different intensities. Generally speaking, the more intense the lightning discharge, the higher are the values of channel temperature, electron density and relative concentrations of highly ionized particles, but the lower the concentration of the neutral atoms. After considering the Coulomb interactions between positive and negative particles in the calculations, the results of ionization energies decrease, and the particle densities of atoms and first ionized ions become low while high-ionized ions become high. At a temperature of 28 000 K, the pressure of the discharge channel due to electrons. atoms and ions is about 10 atmospheric pressure, and it changes for different lightning stroke with different intensity. The mass density of channel is lower and changes from 0.01 to 0.1 compared to the mass density of air at standard temperature and pressure (STP). |
| 收录类别 | SCI |
| WOS关键词 | RETURN-STROKE ; PEAK TEMPERATURE ; CHANNEL |
| WOS研究方向 | Spectroscopy |
| WOS类目 | Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000259688600012 |
| 出版者 | BEIJING UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556077 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Yuan Ping |
| 作者单位 | 1.NW Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Jie,Yuan Ping,Zhang Hua-ming,et al. The study on the characteristics and particle densities of lightning discharge plasma[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2008,28(9):2003-2008. |
| APA | Wang Jie,Yuan Ping,Zhang Hua-ming,&Shen Xiao-zhi.(2008).The study on the characteristics and particle densities of lightning discharge plasma.SPECTROSCOPY AND SPECTRAL ANALYSIS,28(9),2003-2008. |
| MLA | Wang Jie,et al."The study on the characteristics and particle densities of lightning discharge plasma".SPECTROSCOPY AND SPECTRAL ANALYSIS 28.9(2008):2003-2008. |
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来源：寒区旱区环境与工程研究所
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