Effect of air pressure on the spatial and emission characteristics of an aluminum laser torch under subthreshold conditions of ablation

The spatial characteristic of an aluminum laser-induced plasma are studied at a laser radiation intensity of (3.8–4.8) × 10 8 W/cm 2 and an air residual pressure of 6.7–133.3 Pa. It is found that the duration of the aluminum plasma glow is 50 μs and decreases with decreasing laser power output. The...

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Bibliographic Details
Published inTechnical physics Vol. 56; no. 1; pp. 117 - 120
Main Authors Chuchman, M. P., Shuaibov, A. K., Mesarosh, L. V.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 2011
Springer
Subjects
Aluminum compounds
Classical and Continuum Physics
Emissions (Pollution)
Epitaxy
Gallium compounds
Nuclear radiation
Optics
Physics
Physics and Astronomy
Quantum Electronics
Plasma Glow
Timing Waveform
Laser Power Density
Laser Plasma
Aluminum Nitride
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Summary:The spatial characteristic of an aluminum laser-induced plasma are studied at a laser radiation intensity of (3.8–4.8) × 10 8 W/cm 2 and an air residual pressure of 6.7–133.3 Pa. It is found that the duration of the aluminum plasma glow is 50 μs and decreases with decreasing laser power output. The glow intensity reaches a maximum at t = 1.4 μs and rises with laser energy. Typical sizes of the emitting area on the laser torch are determined.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784211010063