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Resonance enhanced laser-induced breakdown spectroscopy

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Resonance enhanced laser-induced breakdown spectroscopy

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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.

Toon meer
OrganisatieDe Haagse Hogeschool
AfdelingTISD Technische Natuurkunde
PartnersTNO Optics
Jaar2013
TypeBachelor
TaalEngels

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