Temporal and spatial dynamics of laser-induced aluminum plasma in argon background at atmospheric pressure: Interplay with the ambient gas

Effect of ambient gas pressure and nature on the temporal evolution of aluminum laser-induced plasmas

“…However, this assumption clearly contradicts the hydrodynamic hypotheses where the plasma plume pushes out the ambient gas by generating a shockwave. Hence there is no way for the energy to transfer from the gas to the plume and there is no possible electron-gas atom collision 23 until the plume pressure approximately reaches the ambient one. It remains that the most highly energetic species at the plasma plume front may still interact with the ambient gas and may induce its excitation or ionization.…”

Measurement of electron number density and temperature of laser-induced Silver plasma

“…Rashid et al [34] reported the Cu plasma parameters generated by the fundamental, second and third harmonics of a Nd:YAG laser. [6] studied the expansion of a vapor plume ablated from an Al target into an argon gas at atmospheric pressure using time and spaceresolved emission spectroscopy and found plasma core with quite uniform distributions in electron density, temperature and electron number densities. Aragón and Aguilera [22] measured the local electron density in laser-induced plasma of three reference lines (Hα, Fe I and Si II) in air using a Nd:YAG laser and observed that the three lines was emitted from different regions of the plasma.…”

“…The Pulsed laser-induced plasmas (LIPs) has a intensive application in material processing, thin film deposition, environmental monitoring, biomedical studies, military safety usage, art restoration/conservation and metal analysis, which is being produced after laser irradiance on the surface of metals and is of a great interest since last few decades [1][2][3][4][5][6][7][8][9][10][11]. In LIPS method, a micro-plasma is produced in nanosecond when highly intense laser pulse interacts with a target material; resultantly vaporization take place and thus plasma produced expand along the path of distribution in the form of vapor plume.…”

Accuracy improvement of quantitative analysis by spatial confinement in laser-induced breakdown spectroscopy

“…The sensitivity of LIBS can be significantly improved using the methods described above [19,20]. However, there are two drawbacks: one is the increased complexity of the LIBS setup, and the other is the increased cost of using more than one laser.…”