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Effect of ambient pressure on laser ablation and plume expansion dynamics: A numerical simulation
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10.1063/1.2182078
/content/aip/journal/jap/99/6/10.1063/1.2182078
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/6/10.1063/1.2182078
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Laser intensity-time profile assumed in the model. It is a Gaussian-shaped pulse with full width at half maximum and peak irradiance of . The solid line represents the original laser pulse and the dashed line represents the calculated laser irradiance arriving at the target, after passing through the plume (plasma).

Image of FIG. 2.
FIG. 2.

Calculated fraction of laser energy absorbed by the plume as a function of ambient pressure. The original laser pulse is given in Fig. 1.

Image of FIG. 3.
FIG. 3.

Calculated maximum surface temperature as a function of ambient pressure for the condition shown in Fig. 1.

Image of FIG. 4.
FIG. 4.

Calculated maximum evaporation rate as a function of ambient pressure for the condition shown in Fig. 1.

Image of FIG. 5.
FIG. 5.

Calculated evaporation depth as a function of ambient pressure for the condition shown in Fig. 1.

Image of FIG. 6.
FIG. 6.

Spatial distribution of (a) calculated Cu vapor density and (b) calculated ambient He gas density, at different times: 8 (1), 16 (2), 24 (3), 32 (4), and (5), for the laser condition shown in Fig. 1 and ambient pressure at .

Image of FIG. 7.
FIG. 7.

Spatial distribution of (a) calculated plume velocity and (b) calculated plume temperature, at different times: 8 (1), 16 (2), 24 (3), 32 (4), and (5), for the laser condition shown in Fig. 1 and ambient pressure at .

Image of FIG. 8.
FIG. 8.

Spatial distribution of (a) calculated Cu vapor density (solid line), calculated ambient gas density (dash-dotted line), and calculated electron density (dashed line) and (b) calculated plume temperature at , for the laser condition shown in Fig. 1 and ambient pressure at .

Image of FIG. 9.
FIG. 9.

Spatial distribution of (a) calculated Cu vapor density (solid line), calculated ambient gas density (dash-dotted line), and calculated electron density (dashed line) and (b) calculated plume temperature at , for the laser condition shown in Fig. 1 and ambient pressure at .

Image of FIG. 10.
FIG. 10.

(Color online) Calculated plume length at different times: 10 (●), 20 (▴), and (▾), as a function of ambient pressure, for the condition shown in Fig. 1.

Image of FIG. 11.
FIG. 11.

(Color online) Calculated maximum plume temperature at different times: 10 (●), 20 (▴), and (▾), as a function of ambient pressure, for the condition shown in Fig. 1.

Image of FIG. 12.
FIG. 12.

(Color online) Calculated maximum Cu vapor density at different times: 10 (●), 20 (▴), and (▾), as a function of ambient pressure, for the condition shown in Fig. 1.

Image of FIG. 13.
FIG. 13.

(Color online) Calculated maximum electron density in the plume at different times: 10 (●), 20 (▴), and (▾), as a function of ambient pressure, for the condition shown in Fig. 1.

Image of FIG. 14.
FIG. 14.

(a) Laser intensity-time profile. It is a Gaussian-shaped pulse with full width at half maximum and peak irradiance of . The solid line represents the original laser pulse and the dashed line represents the calculated laser irradiance arriving at the target, after passing through the plume (plasma). (b) Calculated evaporation depth vs time for the laser condition given in (a). (c) Measured target surface depth profile after 200 laser pulses.

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/content/aip/journal/jap/99/6/10.1063/1.2182078
2006-03-23
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of ambient pressure on laser ablation and plume expansion dynamics: A numerical simulation
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/6/10.1063/1.2182078
10.1063/1.2182078
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