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K: Fachverband Kurzzeitphysik

K 7: Laseranwendungen und Lasermaterialbearbeitung II

K 7.1: Vortrag

Donnerstag, 15. März 2012, 14:00–14:15, V57.04

Plasma characterization for direct composition analysis with laser-induced breakdown spectroscopy — •Johannes Heitz, Johannes D. Pedarnig, and Philipp Kolmhofer — Christian Doppler Laboratory for Laser-Assisted Diagnostics, Johannes Kepler University Linz, A-4040 Linz, Austria

Laser-induced breakdown spectroscopy (LIBS) is an attractive method for fast and quantitative composition analysis that can be employed for many different materials, for instance multi-element oxides or polymers. Important parameters for quantitative analysis can be obtained directly from line intensities and line profiles in the LIBS plasma. For UV-VIS LIBS analysis of industrial slag materials from steel production, the Te values are estimated via Saha-Boltzmann plots of neutral and singly ionized calcium and titanium spectral lines. We are then able to determine the major oxide components by a calibration-free (CF) approach with relative errors below 15 % [1]. We also present LIBS investigations of polyethylene (PE) by evaluation of spectra in the VUV spectral range down to 115 nm [2].

[1] B. Praher, V. Palleschi, R. Viskup, J. Heitz, J.D. Pedarnig: Spectrochimica Acta Part B 65, 671 - 679 (2010). [2] J. Jasik, J. Heitz, J.D. Pedarnig, P. Veis: Spectrochimica Acta Part B 64, 1128 - 1134 (2009).