Characterization of laser induced tantalum plasma by spatio-temporal resolved optical emission spectroscopy |
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Authors: | A. Alkhawwam K. AlnamaA. Jazmati M.D. Zidan |
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Affiliation: | Physics Department, Atomic Energy Commission, Damascus, Syria |
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Abstract: | The spatial and temporal behavior of the tantalum plasma produced in air by third harmonic Nd:YAG laser (0.6 GW cm−2) has been studied using optical emission spectroscopy. Excitation temperature and electron density have been estimated from the analysis of spectral data as well as their spatio-temporal evolutions. As the delay time increases from 400 to 2000 ns, the excitation temperature has found to decrease from 10,000 K to 7900 K. The value of Ne decreases continuously from 4 × 1018 near the zero position to 5 × 1017 in a linear approach along with the propagation axe of the plasma plume. Laser-supported consumption wave regime has been proposed to explain the propagation of the plasma. |
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Keywords: | Laser induced plasma Tantalum Optical emission spectroscopy Spatio-temporal evolution Electron density |
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