• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Modulation and mechanism of shockwaves induced on metals by femtosecond laser double-pulse
【24h】

Modulation and mechanism of shockwaves induced on metals by femtosecond laser double-pulse

机译：由飞秒激光双脉冲在金属上引起的冲击波的调制与机制

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An ultrafast pump-probe shadow graph imaging system and a laser induced breakdown spectroscopy (LIBS) system were used to investigate the modulation and mechanism of shockwaves of nickel (Ni) and aluminum (Al) induced by femtosecond laser double-pulse. With a suitable pulse delay, the bulge in the axial direction of the shockwave can be effectively eliminated and the shockwave expanded evenly in a hemispheric structure. The radial expansion distance of shockwaves of Ni and Al increased by 30% and 50% respectively with double-pulse excitation. The strong coupling of laser with liquid layer and plasma shielding effect were responsible for the enhancement of shockwaves within different regimes of pulse delay. Different enhancement trends were observed for the shockwaves of Ni and Al in the initial regime of pulse delay. Further study indicated that the reduced ablation volume of Al counteracted the enhancement effect of double-pulse on plasma and shockwave and it was the dominant mechanism for the stagnant of Al shockwave. The LIBS results of Ni and Al showed good agreement with the increasing tendency of shockwaves and confirmed the non-negligible effect of the removal volume on the intensity of plasma and shockwave. The results and mechanism exhibited the potential of femtosecond laser double-pulse in plasma and shockwave modulation and application.
机译：超快泵探针暗影图形成像系统和激光诱导的击穿光谱（LIBS）系统用于研究由飞秒激光双脉冲引起的镍（Ni）和铝（Al）冲击波的调制和机制。利用合适的脉冲延迟，可以有效地消除冲击波的轴向的凸起，并且冲击波在半球形结构中均匀地膨胀。 Ni和Al的冲击波的径向膨胀距离分别增加了30％和50％，双脉冲激发分别增加了30％和50％。激光与液体层和等离子体屏蔽效果的强耦合负责在脉冲延迟的不同制度内增强冲击波。在脉冲延迟初始制度中，Ni和Al的冲击波观察到不同的增强趋势。进一步的研究表明，Al的减少的消融体积抵消了双脉冲对等离子体和冲击波的增强作用，并且是Al Shockwave滞留的主要机理。 Ni和Al的Libs结果表明，与冲击波的增加，并确认了去除量对等离子体和冲击波强度的不可忽略不可或缺的影响。结果和机制表现出血浆和冲击波调制和应用中的飞秒激光双脉冲的潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号