Title of article :
Two-dimensional gas-dynamic model of laser ablation in an ambient gas
Author/Authors :
A.V. Gusarov، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Pages :
7
From page :
66
To page :
72
Abstract :
A two-step gas-dynamic model of laser ablation in an ambient gas atmosphere is proposed. The initial 1D stage is related to ablation plume formation and describes heating, melting and evaporation of the target, the target-vapour interaction in the boundary layer, and vapour dynamics. The final 2D stage is responsible for the formation of energy and angular distributions of the ablated material. These distributions are calculated assuming local thermodynamic equilibrium. Interaction between the vapour and ambient gas is taken into account by two-component gas-dynamic equations. Numerical analysis of laser ablation in ambient gas atmosphere revealed that both kinetic energy of ablated atoms and width of their angular distribution decrease with ambient pressure. Dynamics of ablated material expansion and its energy distribution are compared with the experiment. q2000 Elsevier Science B.V. All rights reserved
Keywords :
Laser ablation , Ambient gas , gas dynamics , Energy distribution , angular distribution
Journal title :
Applied Surface Science
Serial Year :
2000
Journal title :
Applied Surface Science
Record number :
995896
Link To Document :
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