Efectos de la aplicación de un campo eléctrico estático sobre la dinámica y parámetros físicos del plasma inducido por un pulso láser en una superficie metálica

Abstract

The present work was motivated by the study of the properties of a plasma generated by a high energy laser pulse when an external electric field is present. For this it was necessary to build a device that is coupled with the equipment that generates the laser pulse, which provides an electric field using a high voltage source. In this way it is possible to record the spectrum of atomic emission that the sample has when the electric field is present, and thus study its effect on the spectral lines. This is intended to increase and improve the signal strength of some element with low concentration in the sample and thus expand the analysis of the LIBS technique. Additionally, a qualitative study of the generated plasma was carried out in order to better understand the way in which it propagates in space and its temporal evolution when the electric field is present. This model was programmed in MatLab® and Wolfram Mathematica 11®. This allowed to evaluate and corroborate the results obtained experimentally in this work and others reported in the bibliography.