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Effects of pulse duration upon the plume formation by the laser ablation of Cu in water
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10.1063/1.2759182
/content/aip/journal/jap/102/2/10.1063/1.2759182
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/2/10.1063/1.2759182
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Emission spectra obtained in water for Cu I (or ) fine-structure doublet at 324.75 and 327.40 nm for various delay times. The gate width of data acquisition was 5000 ns. The energy of the ablation pulse was adjusted to 1.7 mJ. Each spectrum is an accumulation of the spectra obtained by five consecutive pulse shots. Pulse duration was (a) 20 and (b) 150 ns.

Image of FIG. 2.
FIG. 2.

Images of ablation plumes obtained by the 20-ns pulse. The ICCD gate delay from the laser oscillation is noted in each image. The gradation scale of each image is optimized for the highest clarity. For the delay time of 180 ns, of the light was cut by a ND filter to avoid saturation of the detector. The white broken line indicates the target surface.

Image of FIG. 3.
FIG. 3.

Images of ablation plumes obtained by the 150-ns pulse. The ICCD gate delay from the laser oscillation is noted in each image. The gradation scale of each image is optimized for the highest clarity. For the delay times of 200, 300, and 400 ns, of the light was cut by a ND filter to avoid saturation of the detector. The white broken line indicates the target surface. The size of the images for 1500 and 2000 ns are reduced into half.

Image of FIG. 4.
FIG. 4.

Examples of intensity distributions (a) in the lateral direction and (b) in the vertical direction. They are obtained by the integration of emission images (a) in the direction normal to the target surface and (b) in the direction parallel to the target surface, respectively. The irradiation pulse duration was 150 ns and the delay time from the laser oscillation was 400 ns for these examples. The broken line indicates the target surface.

Image of FIG. 5.
FIG. 5.

Integrated total emission intensities obtained by the irradiation with the 20-, 50-, 90-, and 150-ns pulses. Open circles show integrated emission intensities plotted as a function of delay time. Broken lines represent the intensity of the laser pulses.

Image of FIG. 6.
FIG. 6.

The lateral size of the ablation plumes obtained by the irradiation of the 20-, 50-, 90-, and 150-ns pulses. Filled circles show the lateral size as a function of delay time, while the broken line represents the intensity profile of a laser pulse.

Image of FIG. 7.
FIG. 7.

The vertical size of the ablation plumes obtained by the irradiation of the 20-, 50-, 90-, and 150-ns pulses. Filled circles show the vertical size as a function of delay time, while the broken line represents the intensity profile of a laser pulse.

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/content/aip/journal/jap/102/2/10.1063/1.2759182
2007-07-25
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of pulse duration upon the plume formation by the laser ablation of Cu in water
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/2/10.1063/1.2759182
10.1063/1.2759182
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