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Abstract

Background: The spectroscopy study of atomic emission from the expanding plasma plume formed during the laser-matter interaction what is called Laser Induced Breakdown Spectroscopy (LIBS). It provides valuable information about the composition of the target material. In this study, The plasma produced by the interaction of high fluence Nd: YAG laser at the wavelength of 1064 nm with Silicon-Aluminum target (Si:Al). Studied the laser-induced plasma generated at different laser energies has been characterized using optical emission spectroscopy. High power pulse laser is used to generate plasma from (Si:Al) target. The electron temperatures (T e ) and plasma density (n e ) were calculated by Boltzmann plot method from singly ionized aluminum emission lines (Al II), and Saha equation, respectively. T e and n e utilized to evaluate the plasma parameters such as Debye length (λ D ), number of particles in Debye sphere (N D ) and plasma frequency (ω p ).