Description
Ultrashort and short laser pulses are employed to ablate tiny mass of samples from macroscopic specimens and to detect chemical elements at low concentration by optical emission spectroscopy of the laser-induced plasma. Ultrashort femtosecond laser-induced breakdown spectroscopy (fs-LIBS) of thin metal layers on glass enables to detect various elements for few femtogram of ablated mass per laser pulse). Orthogonal fs-double-pulse excitation enhances the emission line intensities. Short nanosecond laser pulses are used for LIBS measurements of industrial steel samples. The LIBS spectra reveal a surprisingly strong matrix effect. However, this detrimental matrix effect is overcome when the laser-ablated sample is re-excited by an electric spark discharge (Laser Ablation-Spark Discharge-Optical Emission Spectroscopy, LA-SD-OES). The different behavior of LA-SD-OES and LIBS is probably due to different processes of sampling and excitation of analytical plasma. Acknowledgments: Financial support by the Austrian Research Promotion Agency FFG is gratefully acknowledged (K-project PSSP 871974, COMET Competence Center CHASE GmbH 868615).| Period | 26 Feb 2024 |
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| Event title | High Power LaserAblation HPLA 2O24 |
| Event type | Conference |
| Location | United StatesShow on map |
Fields of science
- 103016 Laser physics