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Double pulse ultrafast laser ablation of nickel in vacuum
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Crater profile measured with ZYGO interferometer of an ablation crater produced by DPs separated by 200 ps delay. (b) Depth profile along the major axis of the crater.

Image of FIG. 2.
FIG. 2.

Depth profiles for ablation using DPs with various delays. The SP profile is also shown.

Image of FIG. 3.
FIG. 3.

Ablated volume and maximum ablation depth as a function of delay between pulses. SP values are shown by arrows.

Image of FIG. 4.
FIG. 4.

Ion TOF signals for different delays between the two laser pulses. SP indicates the signal for SP irradiation.

Image of FIG. 5.
FIG. 5.

Ion yield at as a function of the delay between pulses. The dashed curve is a guide to the eye. The arrow indicates the yield for the first pulse only (SP).

Image of FIG. 6.
FIG. 6.

(a) Angular distribution of the ion yield with respect to the target normal for a SP and DP irradiations. The distributions have been normalized to the same maximum. The curves show the fit to Eq. (1). (b) -value of the angular distribution as a function of the delay, , between the pulses. The line is a guide to the eye. The arrow indicates the -value for the first pulse only (SP).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Double pulse ultrafast laser ablation of nickel in vacuum