Samenvatting

Resonance-enhanced laser-induced breakdown spectroscopy was used to increase the elemental sensitivity of laser-induced breakdown spectroscopy. In resonance-enhanced laser-induced breakdown spectroscopy, two lasers are used. The first laser creates a
plasma, and the second laser re excites the most abundant element. A setup is build and measurements were performed on basalt, a titanium alloy and a steel 316 alloy. An enhancement in signal-to-noise ratio of up to 7-fold was found for the titanium alloy. The in fluence of the quality of the beam profi le was also investigated. When the excitation laser becomes ablative and a second crater is created, the resonance enhancement disappears. The signal was still enhanced but by thermal excitation, which is not as e ffective. Resonance-enhanced laser-induced breakdown spectroscopy was found to be very effective, but also very sensitive to spacial and temporal alignment.