Paramagnetic Metal Shocked by Laser-Driven Acoustic Waves: A Morphological Aspect

The laser-induced shock wave was studied using two different laser intensities in both air and water for a 7 ns pulse. The laser intensity used was 3 and 6 GW/cm2. The results indicated an increase in surface temperature with laser energy, reaching 29,7958 degrees Celsius for 3 GW/cm2 and 15836 °C for 6 GW/cm2, and the temperature in water was found to be more significant than in air, ranging from 7983 to 15957 °C. The shock wave pressure increased with laser intensity, reaching 0.1 to 0.18 GPa in air and 7.54 to 10.66 GPa in water. The shock wave wavelength was longer in water than in air, and its duration decreased in water. When shocking aluminium is in water, the affected area is also reduced. After laser-induced breakdown spectroscopy (LBS) in water, the surface roughness decreased from 1.68 to 0.53 µm, and there was a minimization of optical aberrations that eliminated "hot spots" in the focal length of the laser.