Wang Tie-Jun, Wei Yingxia, Liu Yaoxiang, Chen Na, Liu Yonghong, Ju Jingjing, Sun Haiyi, Wang Cheng, Lu Haihe, Liu Jiansheng, Chin See Leang, Li Ruxin, Xu Zhizhan
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China.
Centre d'Optique, Photonique et Laser (COPL) and Département de physique, de génie physique et d'optique, Université Laval, Québec, Québec G1V 0A6, Canada.
Sci Rep. 2015 Dec 18;5:18681. doi: 10.1038/srep18681.
Laser based lightning control holds a promising way to solve the problem of the long standing disaster of lightning strikes. But it is a challenging project due to insufficient understanding of the interaction between laser plasma channel and high voltage electric filed. In this work, a direct observation of laser guided corona discharge is reported. Laser filament guided streamer and leader types of corona discharges were observed. An enhanced ionization took place in the leader (filament) through the interaction with the high voltage discharging field. The fluorescence lifetime of laser filament guided corona discharge was measured to be several microseconds, which is 3 orders of magnitude longer than the fluorescence lifetime of laser filaments. This work could be advantageous towards a better understanding of laser assisted leader development in the atmosphere.
基于激光的闪电控制为解决长期存在的雷击灾害问题提供了一种很有前景的方法。但由于对激光等离子体通道与高压电场之间的相互作用了解不足，这是一个具有挑战性的项目。在这项工作中，报道了对激光引导电晕放电的直接观测。观测到了激光细丝引导的流光和先导类型的电晕放电。通过与高压放电场的相互作用，先导（细丝）中发生了增强的电离。测量得到激光细丝引导电晕放电的荧光寿命为几微秒，比激光细丝的荧光寿命长3个数量级。这项工作可能有助于更好地理解大气中激光辅助先导的发展。
