Spatial confinement effects in laser-induced breakdown spectroscopy

The spatial confinement effects in laser-induced breakdown of aluminum (Al) targets in air have been investigated both by optical emission spectroscopy and fast photography. A KrF excimer laser was used to produce plasmas from Al targets in air. Al atomic emission lines show an obvious enhancement i...

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Bibliographic Details
Published in:Applied physics letters 2007-08, Vol.91 (8), p.081501-081501-3
Main Authors: Shen, X. K., Sun, J., Ling, H., Lu, Y. F.
Format: Article
Language:English
Subjects:
AIR
ALUMINIUM
BREAKDOWN
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONFINEMENT
EMISSION
EMISSION SPECTROSCOPY
KRYPTON FLUORIDE LASERS
PHOTOGRAPHY
PLASMA
PLUMES
SHOCK WAVES
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Summary:The spatial confinement effects in laser-induced breakdown of aluminum (Al) targets in air have been investigated both by optical emission spectroscopy and fast photography. A KrF excimer laser was used to produce plasmas from Al targets in air. Al atomic emission lines show an obvious enhancement in the emission intensity when a pair of Al-plate walls were placed to spatially confine the plasma plumes. Images of the Al plasma plumes showed that the plasma plumes evolved into a torus shape and were compressed in the Al walls. The mechanism for the confinement effects was discussed using shock wave theory.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2770772