【摘 要】
：
The mechanical effect induced by the cavitation bubble collapse in the neighborhood of a solid boundary was investigated by focusing a Q-switched laser pulse on
【机 构】
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School of Electronics and information,Department of Applied Physics
【基金项目】
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the National Natural Science Foundation of China;the National Key Opening Experiment Foundation of Laser Technology;江苏省教育厅自然科学基金;高等学校优秀青年教师教学科研奖励计划
论文部分内容阅读
The mechanical effect induced by the cavitation bubble collapse in the neighborhood of a solid boundary was investigated by focusing a Q-switched laser pulse on a metal target in water.By means of a fiber-coupling optical beam deflection technique, the displacement generated by liquid-jet impact at the final stage of the bubble collapse was detected at the epicenter of the rear metal surface.Furthermore, by combining a widely used laser ablation model with the detection principles of this detector, the transient impact force exerting on the target material could be easily estimated.Besides, according to experimental results and the modified Rayleigh theory, the maximum bubble radius and the liquid-jet pressure were also obtained, which are in good agreement with previous results.
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