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Journal of Applied Physics / Volume 104 / Issue 10 / LASERS, OPTICS, AND OPTOELECTRONICS
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J. Appl. Phys. 104, 103108 (2008); http://dx.doi.org/10.1063/1.3021466 (7 pages)

Spectroscopic characterization of laser ablation brass plasma

Nek M. Shaikh1,2, Sarwat Hafeez1, M. A. Kalyar1, R. Ali1, and M. A. Baig1

1Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, 45320 Islamabad, Pakistan
2Institute of Physics, University of Sindh, 76080 Jamshoro, Pakistan

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(Received 22 July 2008; accepted 4 October 2008; published online 18 November 2008)

We present optical emission studies of the laser ablation brass plasma generated by the fundamental, second, and third harmonics of a neodymium doped yttrium aluminum garnet laser. The spectra predominantly reveal the spectral lines of the neutral and singly ionized copper and zinc. The excitation temperatures are determined by the Boltzmann plot method, whereas the electron number densities have been extracted from the Stark broadened line profiles. The spatial variations in the spectral line intensities and the plasma parameters at 1000, 500, and 100 mbar air pressures have been evaluated. Besides, the effect of the ambient gases (He, Ne, and Ar), the laser irradiance, and the laser wavelengths on the plasma parameters have been investigated.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL DETAILS
  3. RESULTS AND DISCUSSION
    1. Optical emission spectra
    2. Excitation temperature and electron number density
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

plasma density, plasma diagnostics, plasma pressure, plasma production by laser, plasma temperature

PACS

  • 52.70.Kz

    Optical (ultraviolet, visible, infrared) measurements

  • 52.25.-b

    Plasma properties

  • 52.50.Jm

    Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3021466

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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Figures (6) Tables (2)

Figures (click on thumbnails to view enlargements)

FIG.1
(a) Emission spectrum of the brass plasma produced by the 1064 nm laser covering the wavelength region 213–231 nm showing predominately the spectral lines of neutral and singly ionized copper. (b) Emission spectrum of the brass plasma covering the wavelength region 248–258 nm showing the spectral lines of neutral and singly ionized copper and zinc. (c) Emission spectrum of the brass plasma covering the wavelength region 322–336 nm showing the spectral lines of neutral copper and zinc. (d) Emission spectrum of the brass plasma covering the wavelength region 400–445 nm showing the spectral lines of neutral copper. (e) Emission spectrum of the brass plasma covering the wavelength region 445–483 nm showing the spectral lines of neutral copper and zinc.

FIG.1 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.2
Excitation temperature of the brass plasma at different pressures and in different gas environments (Ar, Ne, and He).

FIG.2 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.3
Spatial variation in the intensity of the Cu (I) lines at 510.55, 515.32, and 521.82 nm at an atmospheric air pressure.

FIG.3 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.4
Spatial variation in the intensity of the Zn (I) lines at 468.01, 472.21, and 481.05 nm at an atmospheric air pressure.

FIG.4 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.5
Spatial variation in the electron number density, produced by the 1064 nm laser at 1000, 500, and 100 mbar of the ambient gas.

FIG.5 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.6
Variation in the electron number density of the brass plasma as a function of the laser fluence using the 1064, 532, and 355 nm lasers.

FIG.6 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

Tables

Table I. Spectroscopic parameters of the neutral zinc lines used in the determination of the excitation temperature.

View Table
Table II. Spectroscopic parameters of the neutral copper lines used in the determination of the excitation temperature.

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