|Title||Laser-induced breakdown spectroscopy: flat surface vs. cavity structures|
|Publication Type||Journal Article|
|LBNL Report Number||LBNL-56016|
|Year of Publication||2004|
|Authors||Mao, Samuel S., Xianzhong Zeng, Xianglei Mao, and Richard E. Russo|
|Keywords||ablation, analysis, breakdown, cavity aspect ratio, cavity structure, chemical analysis, chemical-analysis, density, development, electron, electron density, electron-density, high temperature, high-temperature, laser, laser ablation, laser induced breakdown spectroscopy, laser induced plasma, laser-ablation, laser-induced breakdown, laser-induced breakdown spectroscopy, laser-induced plasma, laser-pulses, libs, paper, plasma, pulse, pulses, quantitative chemical analysis, ratio, spectra, spectroscopy, spectrum, structure, surface, surfaces, temperature|
Cavity formation is a common phenomenon involved in solid-state analysis when repetitive laser pulses are applied to induce breakdown spectra. While previous LIBS investigations have been mostly focused on laser ablation on flat surfaces, the development of a laser-induced plasma inside cavity structures is of both fundamental and practical significance for quantitative chemical analysis using LIBS. In this paper, we attempt to answer the question, to what extent cavity formation would influence the temperature and electron density of laser-induced plasma. We found a significant effect of cavity aspect ratio on plasma characteristics, in particular, the measured high temperature and electron density of laser-induced plasma inside cavity structures.
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