关于脉冲激光辐照靶材作用机理的研究

Study on Action Mechanism of Target Material Irradiated by Pulsed Laser

脉冲激光辐照靶材作用机理的研究在激光加工等领域具有重要的科学意义和应用潜力。为了直观体现脉冲制式强激光对靶材的破坏优势,考虑靶材本身、入射激光因素对激光辐照靶材的破坏作用的影响,利用有限容积法对激光辐照靶材的作用过程进行模拟,重点研究了脉冲激光与靶材相互作用的机理,建立了数学模型,得到了三种不同形式的脉冲激光辐照靶材的温度场及作用过程。实验结果表明,脉冲激光辐照靶材可分为升温、熔孔和熔孔深径比增加三个阶段,且重复频率脉冲激光对靶材的破坏效果大于间歇脉冲激光。

The research on the action mechanism of target material irradiated by pulsed laser has the important scientific significance and potential application in the industrial fields,such as laser processing.In order to visual?ize the damage advantage of pulsed laser on target material,the influence of target material itself and incident laser on the destructive effect of the laser irradiation target material is considered,and the process of laser irradiated tar?get material is simulated by the finite volume method.The action mechanism of pulsed laser and material is focused on,and the mathematical model is established.In addition,the temperature field and action process of three differ?ent forms of pulsed laser on target material have been obtained.The experimental results show that pulsed laser irra?diation target material can be divided into three stages such as heating up,melting hole and increase of deep diame?ter ratio of molten hole.Furthermore,the repeated frequency pulsed laser has greater damage to target material than intermittent pulsed laser.