Plasma Characteristic of Lightning Discharge Channel
- 作者：ZHANG HuamingYUAN PingZHANG YijunWAN JianjieOUYANG YuhuaWANG Dongfang
- 会议时间：2014-09-10
- 关键词：lightning discharge plasma ; lightning spectra ; discharge channel ; return stroke ; channel temperature ; electron density
- 作者单位：ZHANG Huaming(Thunder Prevention and Observation Center of Shanxi Province, Taiyuan 030002, China)YUAN Ping,WAN Jianjie(College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China)ZHANG Yijun(Laboratory of Lightning Physics and Protection Engineering, Chinese Academy of Meteorological Sciences, Beijing 100081, China)OUYANG Yuhua(School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou 730070, China)WANG Dongfang(Laboratory for Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China)
- 母体文献：第八届全国优秀青年气象科技工作者学术研讨会论文集
- 会议名称：第八届全国优秀青年气象科技工作者学术研讨会
- 会议地点：江苏宜兴
- 主办单位：中国气象学会
- 语种：chi
摘要
The plasma characteristics of a lightning discharge channel are reviewed.The spectrum of the natural lighting is investigated by employing the slit-less spectrograph.It is found that the spectrurm characteristics are closely related to the intensity of the lightning discharge.The lines in the lightning spectrum are classified into essential lines and characteristic lines, according to the characteristics of lightning spectra with different intensities.The characteristics of the lightning channel and the radiation of the lighting plasma are analyzed in the visible and infrared regions.It is shown that, the visible spectrum of lightning is determined by the radiation generated from the early stage to the development of lightning, while the near-infrared spectrum is determined by the radiation generated after current of lightning reaches the peak.The c ahaunel temperature and the electron density are calculated using the information obtained from the lightning spectrun.Both the temperature and the density decrease with the increasing length of lightning channel.Moreover, X-rays and neutrons are produced in the process of lighting mainly due to the pinch effects.