Sorting of Primary and Secondary Raw Material using LIBS Sensors for Accurate Identification

摘要

LIBS (Laser Induced Breakdown Spectroscopy) is an excellent instrument to analyse the atomic composition of solid State samples. A very short laser pulse is focused on the sample surface to be analysed. Due to the high intensities of more than 100 GW/cm2 a plasma plume is generated. At temperatures above 10 000 °C the solid State body is vaporized, cracked into Single atoms and the outer electrons are removed from the atoms. A few 100 ns after the excitation the electrons and ions are recombining emitting element specific characteristic light. The spectra can be analysed in a Czerny-Turner grating spectrometer. Software tools allow füll automated identification and quantitative evaluation of the samples.