Open AccessEffect of temporal evolution of the evaporation surface temperature on the plume expansion under pulsed laser ablation
Author(s) -
A. A. Morozov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1677/1/012143
Subject(s) - plume , evaporation , ablation , materials science , laser ablation , monte carlo method , direct simulation monte carlo , computational physics , mechanics , thermodynamics , optics , physics , laser , statistics , mathematics , dynamic monte carlo method , engineering , aerospace engineering
The effect of the temporal evolution of the evaporation surface temperature on the neutral plume expansion under pulsed evaporation into vacuum has been studied. Two-dimensional calculations have been performed based on the direct simulation Monte Carlo (DSMC) method. The Gaussian distribution of the temporal evolution of the surface temperature is assumed. The regimes with the constant and varying temperature of the evaporation surface have been compared. It is shown that for evaporation of more than ten monolayers the varying temperature leads to a considerable change in the plume dynamics with up to 9% decrease in the average energy of particles passing through a time-of-flight detector on the normal to the surface.