Jinmei Wang, Huijuan Zheng, Peichao Zheng, Guining Tan. Spectral Characteristics of Coptis Chinensis Plasma Induced by Orthogonal Re-Heating Double-Pulse Laser[J]. Chinese Journal of Lasers, 2018, 45(7): 0702006
- Chinese Journal of Lasers
- Vol. 45, Issue 7, 0702006 (2018)
Fig. 1. Experimental setup of orthogonal RDP-LIBS
Fig. 2. Coptis Chinensis. (a) Purchased real objects; (b) samples after preparation
Fig. 3. Spectral intensities and SBRs of four characteristic spectral lines versus detection delay. (a) Fe I; (b) CN; (c) Ca II; (d) Al I
Fig. 4. Spectral intensities and SBRs of four characteristic spectral lines versus pulse interval under different energy groups. (a)(b) Fe I; (c)(d) CN; (e)(f) Ca II; (g)(h) Al I
Fig. 5. Spectral intensities and SBRs of four characteristic spectral lines versus pulse interval (E1=15 mJ, E2=35 mJ, T1=1.5 μs). (a) Fe I; (b) CN; (c) Ca II; (d) Al I
Fig. 6. Signal intensity comparison for SP-LIBS and RDP-LIBS
Fig. 7. Boltzmann linear fitting of Ca II spectral line of Coptis Chinensis samples. (a) RDP-LIBS; (b) SP-LIBS
Fig. 8. Electron excitation temperature of plasma versus detection delay
Fig. 9. Electron number density of plasma versus detection delay
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Table 1. Enhancement factor of spectral intensity and RSD for four characteristic spectral lines
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Table 2. Spectral parameters of Ca II spectral line used for Boltzmann fitting
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