Numerical modeling of the transmission of breakdown plasma generated in water during laser shock processing

Laser ablation in liquids: Applications in the synthesis of nanocrystals

“…One is the adiabatical expansion of the laser-induced plasma under the confinement of liquid, and the other one is the extra pressure increase originated from the shock wave. Fabbro and co-workers [20][21][22][23][24][25][26][27] therefore developed a series of experimental techniques to measure the pressure by characterizations of the shock wave as shown in Fig. 6, and built the theoretical model of the laser-induced pressure generation in PLA in water.…”

“…and pulse duration of 20 ns irradiating a aluminum plate in water. Based on an analytical model [20][21][22][23][24][25][26][27], the maximum pressure generated by the laser-induced plasma in water is given by the following relation:…”

“…On the other hand, for fundamental aspects of laser ablation of solids in liquids, Fabbro and co-workers [20][21][22][23][24][25][26][27] have discussed the possible mechanisms about the thermodynamics of the plasma plume created by PLA based on the experimental measurements of emission spectroscopy and shock wave method. Grigoropoulos and co-workers [28][29][30][31][32][33] gave a detailed description of the thermodynamic and kinetic behaviors of nucleation, growth, and collapse of the bubbles using optical techniques.…”

Laser Doppler interferometer based on a solid Fabry–Perot etalon for measurement of surface velocity in shock experiments

“…Energy losses due to the light absorption in the 3 mm thick water layer [13] and spurious reflection on optical components are about 0.5 J. In such conditions, Berthe [14] and Sollier [15]showed that the shock pressure could reach up to 5 GPa at a power density of 9 GW cm −2 . They also showed that the maximal power density that can be sent to a sample in the water confinement regime is about 9 GW cm −2 .…”

Laser shock processing as a method of decreasing fatigue of a die-casting die made of maraging steel

“…Berthe et al (2000) discussed the generation of plasma and shock waves from the viewpoint of physics under the circumstances in which wave propagation was directed and amplified by means of a covering layer of water. Also, Sollier et al (2001) dealt with a physical description of a numerical plasma model in LSP. They particularly focused on the plasma changes in the final phase of laser-beam action, when the laser-beam energy transfer to the material surface is shadowed (»breakdown plasma«).…”