Abstract :
Theoretical analysis of the influence of the temporal profile (rectangular, triangular, Gaussian) of the laser pulse on heating/cooling and phase
transition velocities and quantity of ablated material was performed on the basis of a multifront Stephan problem. Modeling showed that material
removal under stationary conditions (that correspond to long pulses) is entirely controlled by specific heat and material density, while in the case of
transient regimes (short pulses) thermal conductivity and heat capacity play a predominant role. Interaction of the melting and evaporation fronts
characterized by an evaporation front velocity far exceeding the melting front one is one of the examples of the transient nature of the phenomena
influenced by the laser pulse parameters
