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Spectroscopic studies of Ca plasma generated by the fundamental, second, and third harmonics of a Nd:YAG laser

Published online by Cambridge University Press:  19 March 2008

S. Hafeez ,
N. M. Shaikh  and
M. A. Baig
S. Hafeez
Affiliation:
Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan
M. A. Baig
Affiliation:
Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan
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Abstract

The ablation of calcium sample has been studied by the optical emission spectroscopy of the evolving plasma using the fundamental, second, and third harmonic of a Nd:YAG laser, which reveals numerous transitions due to neutral and singly ionized calcium. The measurements have been performed to determine the electron temperature and electron number density and their spatial behavior. In addition, the behavior of the electron temperature and number density as a function of laser irradiance and ambient gas pressure has been studied. The processes of laser photon absorption in the plasma through inverse bremsstrahlung and photoionization have also been discussed.

Keywords

Boltzmann plotCalciumLaser-ablationPlasmaStark broadening
Type
Research Article
Information
Laser and Particle Beams , Volume 26 , Issue 1 , March 2008 , pp. 41 - 50
Copyright
Copyright © Cambridge University Press 2008

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