Effect of Pressurization on the Dynamics of a Cavitation Bubble Induced by Liquid-Phase Laser Ablation

We applied external high pressure to ambient water in liquid-phase laser ablation. As a result, it was found that the maximum volume V(max) of a cavitation bubble induced by laser ablation satisfied a scaling law of V(max) proportional to P(ext)(-1) with P(ext) being the pressure applied to water. The effect of the pressurization was also observed in the shape of the second bubble induced by the collapse of the first cavitation bubble. These experimental results indicate that the dynamics of a cavitation bubble induced by liquid-phase laser ablation is controlled by the external pressure. (C) 2009 The Japan Society of Applied Physics