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
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
Journal title :
Applied Surface Science