TY - JOUR KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Vaporization KW - Plasma KW - Nanosecond KW - Nanosecond laser KW - Plasma shielding KW - Preferential vaporization AU - Xianglei Mao AU - Wing-Tat Chan AU - Manuel Caetano AU - Mark A Shannon AU - Richard E Russo AB -

Preferential removal of components from mixed material targets and plasma shielding are studied by using inductively coupled plasma-atomic emission spectrometry (ICP-AES) during UV nano-second laser ablation. The ICP emission intensity for Cu and Zn during ablation of brass samples varies versus laser power density. A model using thermal evaporation and inverse Bremsstrahlung processes is presented. The model shows that plasma shielding occurs at approximately 0.3 GW/cm2, in agreement with experimental data for change in the mass ablation rate. The good agreement of model and experimental data suggest that thermal effects are important during nano-second laser ablation for power density less than 0.3 GW/cm2.

BT - Applied Surface Science DA - 04/1996 DO - 10.1016/0169-4332(95)00420-3 LA - eng LB - Laser N1 -

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Preferential removal of components from mixed material targets and plasma shielding are studied by using inductively coupled plasma-atomic emission spectrometry (ICP-AES) during UV nano-second laser ablation. The ICP emission intensity for Cu and Zn during ablation of brass samples varies versus laser power density. A model using thermal evaporation and inverse Bremsstrahlung processes is presented. The model shows that plasma shielding occurs at approximately 0.3 GW/cm2, in agreement with experimental data for change in the mass ablation rate. The good agreement of model and experimental data suggest that thermal effects are important during nano-second laser ablation for power density less than 0.3 GW/cm2.

PY - 1996 SP - 126 EP - 130 T2 - Applied Surface Science TI - Preferential vaporization and plasma shielding during nano-second laser ablation VL - 96-98 ER -