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Spatial and Temporal Evolution of Laser-Generated Microplasmas

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3 Author(s)
Tavassoli, S.H. ; Laser Res. Inst., Shahid Beheshti Univ., Tehran ; Cravetchi, I.V. ; Fedosejevs, R.

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

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Plasma Science, IEEE Transactions on  (Volume:34 ,  Issue: 6 )