Title :
Spatial and Temporal Evolution of Laser-Generated Microplasmas
Author :
Tavassoli, Seyed Hassan ; Cravetchi, Igor V. ; Fedosejevs, Robert
Author_Institution :
Laser Res. Inst., Shahid Beheshti Univ., Tehran
Abstract :
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/cm2) 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
Keywords :
aluminium alloys; plasma diagnostics; plasma production by laser; plasma-wall interactions; 10 ns; 266 nm; 3 to 100 muJ; aluminum alloy surface; gated photography; laser-generated microplasmas; plasma emission; plume expansion; pulse energy; Atmospheric-pressure plasmas; Laser modes; Laser theory; Optical pulses; Plasma applications; Plasma materials processing; Plasma properties; Plasma waves; Pulsed laser deposition; Surface emitting lasers; Ablation; imaging; laser-induced breakdown spectroscopy (LIBS); plasma expansion;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2006.885100
