Interaction of laser radiation with matter. Laser plasma

Hydrodynamic instability of a melt surface under conditions of intense laser surface plasma formation

Yu. A. Chivel'


Abstract: An experimental investigation was made of the stability of the surface of a metal melt exposed to single-pulse neodymium laser radiation in vacuum and at atmospheric pressure. Under conditions of intense plasma formation in vacuum, we observed a hydrodynamic instability of the surface resulting in the formation of large-scale quasiperiodic structures. Mechanisms responsible for the occurrence and evolution of this instability were analyzed.

UDC: 535.21:533.96:532.5

PACS: 61.80.Ba, 61.82.Bg, 68.47.De, 73.20.Mf

Received: 07.12.1990

 English version: Soviet Journal of Quantum Electronics, 1991, 21:10, 1104–1107

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