研究目的
To characterize the laser induced Copper plasma in term of spectral line intensities and plasma parameter (ne and Te) under different laser power energy using LIBS technique.
研究成果
The plasma temperature and electron number density increased with increasing laser energy. The electron temperature was found between 6113 to 7776.4 K, and the electron number density was between 1.77*1015 to 2.01*1015 cm-3 at 1064nm.
研究不足
The study was limited to the characterization of laser induced Copper plasma under different laser power energy using LIBS technique. The influence of other parameters such as ambient medium, laser wavelength, and pulse duration were not considered.
1：Experimental Design and Method Selection:
Used a first harmonic generated wavelength of Nd:YAG exaction source to influence the emission spectrum of laser copper-interaction and plasma parameter for plasma Copper. The metal plasma was detected by HR4000 detection system (ocean optics).
2：Sample Selection and Data Sources:
Copper foil was used as the target.
3：List of Experimental Equipment and Materials:
Nd:YAG (Quantel Brilliant) laser source, HR4000 detection system (ocean optics), convex Lens of 10 cm focal length, fiber optics (High –OH, core diameter: 600μm), collimating lens (45o field of view).
4：Experimental Procedures and Operational Workflow:
The laser pulsed was focused on the copper foil surface, and the spectrum was collected by a fiber optics connected to the HR4000 detection system.
5：Data Analysis Methods:
Plasma temperature was calculated via the Boltzmann plot diagram, and the electron density number was measured by McWhirter CRITERION.
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