Spatial and Temporal Evolution of Laser-Generated Microplasmas

A study of the evolution of microplasmas produced on aluminum alloy surface at ambient air pressure by 266-nm 10-ns laser pulses with energies of 3 to 100 muJ (2 to 68 GW/cm 2 ) is carried out. Gated photography with a minimum width of 5 ns is used to investigate the plasma evolution. Plasma emissio...

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Veröffentlicht in:	IEEE transactions on plasma science 2006-12, Vol.34 (6), p.2594-2599
Hauptverfasser:	Tavassoli, S.H., Cravetchi, I.V., Fedosejevs, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Ablation Aluminum alloys Atmospheric-pressure plasmas Delay Emission Evolution Exact sciences and technology imaging Laser modes Laser theory laser-induced breakdown spectroscopy (LIBS) Lasers Microplasmas Optical pulses Photography Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma Plasma applications plasma expansion Plasma materials processing Plasma production and heating Plasma production and heating by laser beams Plasma properties Plasma waves Plumes Pulsed laser deposition Surface emitting lasers Temporal logic
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Zusammenfassung:	A study of the evolution of microplasmas produced on aluminum alloy surface at ambient air pressure by 266-nm 10-ns laser pulses with energies of 3 to 100 muJ (2 to 68 GW/cm 2 ) is carried out. Gated photography with a minimum width of 5 ns is used to investigate the plasma evolution. Plasma emission and plasma distances from the sample surface are investigated as a function of time. Pulse energy has a strong effect on plasma emission particularly at short delay times. The experimental results are compared with a simplified model of plume expansion
ISSN:	0093-3813 1939-9375
DOI:	10.1109/TPS.2006.885100