Diagnostic and Analytical Studies of Laser Induced Plasmas

Download or read book Diagnostic and Analytical Studies of Laser Induced Plasmas written by Heh Young Moon and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Since its early applications, Laser-Induced Breakdown Spectroscopy (LIBS) has been recognized as a useful tool for solid state chemical analysis due to its numerous attractive advantages as an analytical tool: e.g., simultaneous multi-element detection capability, no sample preparation, rapid or real-time analysis, and allowing in situ analysis requiring only optical access to the sample. However, the quantitative accuracy of the technique depends on the complex fundamental processes involved in laser-induced plasma formation, ablation, atomization, excitation and ion recombination. Thus, problems arising from laser target coupling, matrix effects, line interferences, fractionation in target vaporization, the main assumptions of the methods, namely the optically thin emission of spectral lines and the existence of local thermodynamic equilibrium in the plasma should be properly addressed in order to obtain reliable quantitative results [1, 2] . The general scope of this research encompasses two aspects related to the LIBS technique: one aspect is the fundamental study of the plasma characteristics and another is an improved use of the technique in quantitative analysis. The main project is to revisit and investigate some fundamental assumptions such as the existence of local.