The study of vacuum influence on spatial-temporal dependence of thermal distributions during laser-optical components interaction

Abstract

This paper deals with the evaluation of vacuum influence on the spatial-temporal laser thermal field distributions in optical components during the interaction with a laser source. The solution to the heat equation is given by integral transform technique, and allows us to have with an excellent accuracy an analytical model. Our study concludes that the higher the vacuum around irradiated samples, the higher the sample temperatures. We also note that for normal conditions around the sample the spatial temperature field distribution is influenced by the incident spatial laser distribution, and for temporal point of view we obtain a steady state situation. For very high vacuum conditions we have a flat spatial thermal field distribution and the time evolution of the same thermal field presents a linear behavior. The theory could be applied also for electron beam-solid interaction, if we take the adequate law of absorption.