Abstract
In this report, two collinear laser pulses were used to investigate the laser-induced breakdown spectroscopy (LIBS) emission from aluminum (Al) plasma, for the two cases with and without magnetic field. Time-integrated emission spectra for atomic lines with combined techniques of dual-pulse LIBS (DP-LIBS) and magnetic field were measured to be higher than those recorded with DP-LIBS only. The enhancement factors of about 11 and 5 were obtained in DP-LIBS with and without magnetic field, respectively. The effect of inter-pulse delay time on the intensity enhancement shows a maximum enhancement factor of about 70 and 40 in DP-LIBS with and without magnetic field for atomic line (308.2nm). It was obvious that the combined enhancement effects of dual-pulse and magnetic field in LIBS was stronger than that of DP-LIBS only.
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