Wang Xue-Juan, Yuan Ping, Cen Jian-Yong, Wang Jie, Zhang Ting-Long
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China.
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Key Laboratory of Environment Optics and Technology, Hefei 230031, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2013 Dec;33(12):3192-6.
Combining the spectra of cloud-to-ground lightning return obtained by a slit-less spectrograph with the transport theory of air plasma, the electrical conductivity in one discharge channel was calculated with different methods. The results show that the conductivity of the lightning channel core is of the order of 10(4) S m-1; the conductivity goes down with the increase in the channel height in the same channel; the contributions of the collisions between electron and first or second degree ionized atoms, and electron-electron as well as ion-ion collisions to the electrical conductivity of the lightning channel core can not be neglected; the collision integrals method is more reasonable for calculating the conductivity of the lightning channel core. Based on the conductivity, the discharge current was estimated and compared with the peak current of every return stroke, and the results are in the reasonable range, further, the correlation between the channel temperature and the discharge characteristics is discussed, which provides a practical way for this aspect.
将无狭缝光谱仪获得的云地闪电回击光谱与空气等离子体输运理论相结合，用不同方法计算了一个放电通道中的电导率。结果表明：闪电通道核心的电导率约为10(4) S m-1；在同一通道中，电导率随通道高度增加而降低；电子与一次或二次电离原子之间的碰撞、电子-电子以及离子-离子碰撞对闪电通道核心电导率的贡献不可忽略；碰撞积分法计算闪电通道核心电导率更为合理。基于该电导率估算了放电电流并与各回击峰值电流进行比较，结果在合理范围内，进而讨论了通道温度与放电特性之间的相关性，为该方面研究提供了一种实用方法。
