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Proceedings Paper

Investigation of the laser generated ablation plasma plume dynamics and plasma plume sound wave dynamics
Author(s): Mateusz Tański; Robert Barbucha; Marek Kocik; Katarzyna Garasz; Jerzy Mizeraczyk
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Paper Abstract

We investigated the dynamics of laser generated ablation plasma plume expanding in ambient air and dynamics of the sound wave generated by the expanding plasma. The ablation plasma plume was generated during nanosecond laser micromachining of the thin metal foil. The time-resolved images of the expanding plasma plume and sound wave were captured at several nanosecond intervals. Using captured images the expansion rate of the plasma plume was determined. The initial velocity of the plasma was found to vary from 6.0•103 m/s ± 0.3•103 m/s to 7.3•103 m/s ± 0.3•103 m/s depending on the laser fluence. The initial velocity of the sound wave generated by the expending plasma plume also varies with laser fluence. We also investigated sound wave using acoustic microphone. Based on obtained results we proposed a method for automatic focusing of the laser beam before laser micromachining that involves sound wave acoustic signal analysis.

Paper Details

Date Published: 22 January 2013
PDF: 7 pages
Proc. SPIE 8703, Laser Technology 2012: Applications of Lasers, 87030O (22 January 2013); doi: 10.1117/12.2013415
Show Author Affiliations
Mateusz Tański, The Szewalski Institute of Fluid-Flow Machinery (Poland)
Robert Barbucha, The Szewalski Institute of Fluid-Flow Machinery (Poland)
Marek Kocik, The Szewalski Institute of Fluid-Flow Machinery (Poland)
Katarzyna Garasz, The Szewalski Institute of Fluid-Flow Machinery (Poland)
Jerzy Mizeraczyk, The Szewalski Institute of Fluid-Flow Machinery (Poland)
Gdynia Maritime Univ. (Poland)


Published in SPIE Proceedings Vol. 8703:
Laser Technology 2012: Applications of Lasers
Wiesław L Woliński; Zdzisław Jankiewicz; Ryszard S. Romaniuk, Editor(s)

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