Evaluation of femtosecond LIBS for spectrochemical microanalysis of aluminium alloys |
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Authors: | Igor V Cravetchi Mike T Taschuk Ying Y Tsui Robert Fedosejevs |
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Institution: | (1) Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada, T6G 2V4 |
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Abstract: | The analytical performance of femtosecond laser-induced breakdown spectroscopy (LIBS) for elemental microanalysis of aluminium
alloys and for mapping precipitate distribution on the sample surface has been studied in detail. A Ti–sapphire laser system
producing pulses of 130 fs at 800 nm was used to generate the laser-induced plasma. Multi-element microanalysis of commercially
available aluminium alloys was performed in air at atmospheric pressure. Crater characteristics such as diameter and crater
morphology were characterized by optical and scanning-electron microscopy. Scaling of plasma emission and limit of detection
as a function of laser pulse energy was also investigated. Current experimental results are presented and are compared with
previous nanosecond microLIBS measurements. |
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Keywords: | Laser-induced breakdown spectroscopy (LIBS) Aluminium alloy Precipitates Spectrochemical microanalysis Solid sampling Emission scaling |
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