Fig. 1. (a) Experimental setup; (b) Schematic diagram of power supply

Fig. 2. (a) LIBS spectrum of aluminum alloy; (b) The lifetime curves of Al Ⅱ (at ~358 nm) and Mg Ⅱ (at ~279 nm)

Fig. 3. The intensities of Al Ⅱ (at ~358 nm) and Mg Ⅱ (at ~279 nm) versus the delay time

Fig. 4. The waveforms of plasma emission, discharge current and voltage

Fig. 5. Spectra obtained by LIBS and MD-LIBS

Fig. 6. Temporal evolutions of the intensity of Mg Ⅱ (at ~279 nm) obtained by LIBS and MD-LIBS

Fig. 7. Spectral intensities obtained by LIBS and MD-LIBS