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Observation of laser-pulse-induced traveling microbubbles in dusty plasma liquids
Hong-Yu Chu1, Yen-Kun Chiu, Chia-Ling Chan
1Department of Physics and Center for Complex Systems, National Central University, Chungli 32054, Taiwan, Republic of China.
Abstract:
We report a direct experimental observation of traveling microbubbles induced by intense laser pulses in strongly coupled dusty plasma liquids. The dense plasma ablated from a suspended dust particle generates a spherical plasma bubble with a low dust density, in the quiescent regime before a transition to self-organized longitudinal dust density waves. It travels downwards at a velocity about 6 cm/sec inside the dust liquid. Dust density fluctuations trailing the bubble are also observed. The bubble generated in the high pressure dissipative regime collapses right after formation.