Spectral diagnostics of Al-Ni alloys under laser irradiation: effect of laser energy on plasma parameters

In this research, the effect of laser beam energy on the properties and behavior of plasma produced from aluminum and nickel alloy was studied using the Optical Stimulated Emission Spectroscopy method. The properties of the plasma were characterized by exposing the target material (the alloy) to high-energy laser pulses ranging from 500 to 900 mJ using a pulsed Nd:YAG laser with a pulse rate of up to 50 Hz. This ensures a balanced energy distribution and allows monitoring of the increasing effects in the plasma without strong thermal effects. This method allows for a detailed study of the physical properties of the plasma, including the spectral radiation intensity and associated emission peak as well as the study of various plasma properties such as temperature and electron density and other plasma parameters, including the plasma frequency, Debye length, and Debye number. The results obtained show that both temperature and density increase with increasing laser power, with both effects peaking at a laser power of 900 mJ. Calculations of the plasma frequency and Debye number also show a concomitant increase in these two effects with increasing laser power. This work demonstrates how laser power can increase plasma stability and significantly improve physical processes within plasma. It also demonstrates how diagnostic techniques can be useful in plasma analysis and have numerous medical, industrial, and technological applications.