外文题目: Probing the effective length of plasma inside a filament
作者: Liu, Yaoxiang; Wang, Tiejun; Chen, Na; Du, Shengzhe; Ju, Jingjing; Sun, Haiyi; Wang, Cheng; Liu, Jiansheng; Lu, Haihe; Chin, See Leang; Li, Ruxin; Xu, Zhizhan; Wang, Zhanshan
刊名: Opt. Express
年: 2017 卷: 25 期: 10 页： 11078--11087
英文关键词:

FEMTOSECOND LASER-PULSES; ELECTRICAL-CONDUCTIVITY; AIR; CONDENSATION; PROPAGATION; DISCHARGES; RADIATION; CHANNELS; MEDIA
英文摘要:
We present a novel method based on plasma-guided corona discharges to probe the plasma density longitudinal distribution, which is particularly good for the weakly ionized plasmas (similar to 10(14) cm(-3)). With this method, plasma density longitudinal distribution inside both a weakly ionized plasma and a filament were characterized. When a high voltage electric field was applied onto a plasma channel, the original ionization created by a laser pulse would be enhanced and streamer coronas formed along the channel. By measuring the fluorescence of enhanced ionization, in particular, on both ends of a filament, the weak otherwise invisible plasma regions created by the laser pulse were identified. The observed plasma guided coronas were qualitatively understood by solving a 3D Maxwell equation through finite element analysis. The technique paves a new way to probe low density plasma and to precisely measure the effective length of plasma inside a filament.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1364/OE.25.011078


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