Visualization 1.mp4

Watching the video (Visualization 1) gives an information of the evolution of cavitation structures, while perusing each frame separately, clearly illustrates the propagation of shock waves. Frame 1 [Fig. 5(a)] shows the inception of the main cavitation bubble and the release of a single breakdown-generated shock wave pulse-frozen 6 times. 20 s after the breakdown [frame 2, Fig. 5(b)], the shock wave had been reflected from the acoustic mirror and overpassed the acoustic focus. Small cavities were generated by the shock wave in the preheated cone of the incoming laser pulse. The main bubble reaches its maximum size in frame 16 [Fig. 5(c)] and collapses about 250 ns before the first illumination pulse gives its stamp (innermost circle) in frame 30 [Fig. 5(d)]. At collapse, another shock wave is launched which again generates small bubbles in the incoming laser cone, after its reflection from the acoustic mirror. The location of the acoustic focus can be straightforwardly determined in frame 31 [Fig. 5(e)]. The last image picked [frame 39, Fig. 5(f)] displays in addition to another shock wave emitted during the second collapse of the main bubble, a dislocated shock wave generated at the position of the acoustic focus due to the collapse of the acoustically generated cavitation cloud.