Measurements of aluminum and hydrogen microplasma
We report time-averaged and time-resolved emission spectra subsequent to laser-induced optical breakdown of aluminum in laboratory air and in hydrogen gas. The microplasma generated by nominal 10 ns IR laserradiation shows Stark-broadened and shifted atomic lines. An analysis of the H{alpha} and H{beta} Balmer series lines and selected aluminum lines allows one to determine electron number density in the range of 0.01-10x1018 cm-3 early in the plasma decay. Atomic and molecular features are investigated for diagnostic applications in laser material processing.
- OSTI ID:
- 20929757
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 19 Vol. 46; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
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