Diagnostic analysis of Cu and CuZn plasma produced by Nd: YAG nanosecond laser at 1064 nm

In this research, spectroscopic plasma emission analysis was carryout to study the characteristics of the parameters of Cu and CuZn plasma created in the air at the atmospheric pressure of Q-switched Nd: YAG nanosecond laser system operating at infrared (1064 nm) laser, and laser energy rangy from 300 to 700 mJ. Experimentally, the emission spectral profiles of pure copper (Cu) and brass (CuZn) were observed and captured by the spectrometer, the emitted spectra helpful to extract essential plasma parameters (i.e. Te and ne). These spectra used in the Boltzmann plot method for calculating plasma temperatures; in contrast, the density of electrons by utilized the Stark broadening was estimated. The electron temperature values ranged from 12672–20874 K for Cu and 6630–6810 K for CuZn, and the electron density in the range of 2.4×1018–4.50×1018 cm−3 and 2.3×1018– 4.50×1018 cm−3 for Cu and CuZn, respectively. Electron temperature (Te) and density (ne) using to estimated other parameters of plasma such as Debye length (λD), number of particles in the Debye sphere (N ), and plasma frequency (ωp). Matrix effects in laser-induced metallic plasmas generated from Cu and CuZn matrices have been studied using emission spectroscopy characterization techniques. The variance of the ω we observed that influenced by the laser pulse energy and matrix.