Effects of pulse duration upon the plume formation by the laser ablation of Cu in water
Effects of pulse duration upon the plume formation by the laser ablation of Cu in water
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DOI：
10.1063/1.2759182
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发表时间：
2007-07
影响因子：
3.2
通讯作者：
H. Oguchi;T. Sakka;Y. Ogata
中科院分区：
文献类型：
--
作者：
H. Oguchi;T. Sakka;Y. Ogata
测量了铜板液相激光烧蚀在不同脉冲持续时间下获得的烧蚀羽流的时间分辨图像，并讨论了羽流的发射强度和尺寸。在一些羽流图像中，观察到高密度亮点。 150ns脉冲照射下，发光区域变大，亮点消失。我们得出的结论是，较长脉冲的后半部分的连续激发会扩大羽流并降低羽流密度。这些结果与我们之前的结果一致，即通过 150 ns 脉冲辐照获得了具有高发射强度的展宽较小的原子线光谱。
Time-resolved images of an ablation plume obtained at different pulse durations have been measured for the liquid-phase laser ablation of a Cu plate, and the emission intensity and size of the plume have been discussed. In some plume images, high-density bright spots were observed. The size of the light-emitting region increases and the bright spots disappear for the irradiation with a 150-ns pulse. We conclude that consecutive excitation by the later part of a longer pulse expands the plume and reduces plume density. These results are consistent with our previous result that less-broadened atomic line spectra with high emission intensity were obtained with a 150-ns-pulse irradiation.