title: Laser-filamentation-induced condensation and snow formation in a cloud chamber.
abstract: Using 1 kHz, 9 mJ femtosecond laser pulses, we demonstrate laser-filamentation-induced spectacular snow formation in a cloud chamber. An intense updraft of warm moist air is generated owing to the continuous heating by the high-repetition filamentation. As it encounters the cold air above, water condensation and large-sized particles spread unevenly across the whole cloud chamber via convection and cyclone like action on a macroscopic scale. This indicates that high-repetition filamentation plays a significant role in macroscopic laser-induced water condensation and snow formation.
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Ju
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Liu
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Haiyi
authors.initials: H
authors.lastname: Sun
authors.forename: Wentao
authors.initials: W
authors.lastname: Wang
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Ge
authors.forename: Chuang
authors.initials: C
authors.lastname: Li
authors.forename: See Leang
authors.initials: SL
authors.lastname: Chin
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu