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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers & Short Notes >A Model of Laser-Induced Cavitation
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A Model of Laser-Induced Cavitation

机译：激光诱导空化的模型

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摘要

Evaporation and plasma formation due to laser irradiation and subsequent expansion of the evaporated volume accompanying shock emission were studied theoretically as a phenomenon of laser-induced thermal breakdown rather than an optic breakdown. In recent years, this problem has become particularly important in the field of laser-mediated surgery. The Gilmore model of bubble dynamics based on the Kirkwood-Bethe hypothesis with proper initial conditions was used to calculate the shock pressure. This pressure depends on the radius and expansion velocity of the plasma formed by the laser irradiation. Subsequent bubble evolution after shock departure including the light emission at the collapse point was studied using the Keller-Miksis equation for the bubble wall motion and analytical solutions for the vapor inside the bubble. Calculation results show that the maximum size of the bubble and the half-width of the emitted power of the light pulse at the collapse point depend on the initial bubble radius and the bubble wall velocity. The light emission from the laser-induced bubble at the collapse point turns out to be black body radiation.
机译：理论上研究了由于激光辐照而导致的蒸发和等离子体形成以及随之而来的伴随冲击发射的蒸发体积的扩大，这是由激光引起的热击穿而不是光学击穿的现象。近年来，这个问题在激光介导的手术领域中变得尤为重要。使用基于适当初始条件的柯克伍德-贝特假设的吉尔莫尔泡沫动力学模型来计算冲击压力。该压力取决于由激光照射形成的等离子体的半径和膨胀速度。使用Keller-Miksis方程对气泡壁运动和气泡内部蒸气的解析解进行了研究，研究了冲击消失后随后气泡的演化，包括在崩溃点的发光。计算结果表明，气泡的最大尺寸和在崩溃点的光脉冲发射功率的一半宽度取决于初始气泡半径和气泡壁速度。在塌陷点处由激光诱导的气泡发出的光证明是黑体辐射。

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