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Adaptive femtosecond laser-induced breakdown spectroscopy of uranium
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10.1063/1.4779042
/content/aip/journal/rsi/84/1/10.1063/1.4779042
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/1/10.1063/1.4779042
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup. L—lens, M—mirror, BS—beam splitter.

Image of FIG. 2.
FIG. 2.

Design of sample holder affixed to translation stage (not shown).

Image of FIG. 3.
FIG. 3.

Spectrum of the 415.86 nm Ar emission line obtained using 3600 mm−1 grating for determining the spectral resolution. The close up of the 415.86 Ar line is shown in the inset. Resolution is 0.01 nm, determined by the FWHM of the peak fitted with the Gaussian profile. Solid line—Gaussian fit, points—experimental data.

Image of FIG. 4.
FIG. 4.

Experimental setup for Mach-Zehnder interferometer. DL—delay line, L—lens, M—mirror, BS—beamsplitter.

Image of FIG. 5.
FIG. 5.

Nonlinear phase accumulation B as a function of spot size w on the sample for determining operating range for LIBS. The minimum focal spot size is w0 = 29 µm.

Image of FIG. 6.
FIG. 6.

Focal spot beam profile. The intensity and fluence on the sample based on this beam profile per mJ of input energy are 3.5 × 1015 W/cm2 and ∼140 J/cm2, respectively.

Image of FIG. 7.
FIG. 7.

Uranium spectrum showing the 406.25 nm, 409.01 nm, and 411.61 nm peaks, which correspond to U (II) transitions. Spectrum at −29155 fs2 (a), +8845 fs2 (b) and −72155 fs2 (c) were obtained from an average of 5 sets of 10 shots integrated over 1-s window at each phase setting.

Image of FIG. 8.
FIG. 8.

Variation of the intensity of the 409.01 nm uranium peak for three values of residual GDD: (a) −29155 fs2, (b) +8845 fs2, (c) −72155 fs2.

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/content/aip/journal/rsi/84/1/10.1063/1.4779042
2013-01-25
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Adaptive femtosecond laser-induced breakdown spectroscopy of uranium
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/1/10.1063/1.4779042
10.1063/1.4779042
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