外文题目: Femtosecond laser filament induced condensation and precipitation in a cloud chamber
作者: Ju, Jingjing; Liu, Jiansheng; Liang, Hong; Chen, Yu; Sun, Haiyi; Liu, Yonghong; Wang, Jingwei; Wang, Cheng; Wang, Tiejun; Li, Ruxin; Xu, Zhizhan; Chin, See Leang
刊名: Sci Rep
年: 2016 卷: 6 文章编号：25417
英文关键词:

INDUCED WATER CONDENSATION; AEROSOL FORMATION; TRANSPARENT MEDIA; SNOW FORMATION; AIR; LIGHT; PHYSICS; ICE
英文摘要:
A unified picture of femtosecond laser induced precipitation in a cloud chamber is proposed. Among the three principal consequences of filamentation from the point of view of thermodynamics, namely, generation of chemicals, shock waves and thermal air flow motion (due to convection), the last one turns out to be the principal cause. Much of the filament induced chemicals would stick onto the existing background CCN's (Cloud Condensation Nuclei) through collision making the latter more active. Strong mixing of air having a large temperature gradient would result in supersaturation in which the background CCN's would grow efficiently into water/ice/snow. This conclusion was supported by two independent experiments using pure heating or a fan to imitate the laser-induced thermal effect or the strong air flow motion, respectively. Without the assistance of any shock wave and chemical CCN's arising from laser filament, condensation and precipitation occurred. Meanwhile we believe that latent heat release during condensation/precipitation would enhance the air flow for mixing.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1038/srep25417


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