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Náttúra og náttúrutilfeingi


Laser Induced Breakdown Spectroscopy (LIBS) applied to Underwater Corrosion Studies


Hallur Simonsen

School of Engineering, University of Aberdeen

2009 - 2012

Stuðul úr Granskingargrunninum:
190.177 kr.

This project is concerned with both the theoretical and experimental aspects of the LIBS analysis process applied underwater. The LIBS process (Laser Induced Breakdown Spectroscopy) analyses a small sample of material by ablating (essentially evaporating) that small sample with a pulse of laser light. As the sample then cools a spectrum of light is emitted that is characteristic of the atomic species present and of the abundance of those atomic species. The LIBS process has been known since the 1960s and applied mainly in the laboratory and with limited commercial application. The project is one component of an overall programme to extend the application of LIBS to deep water or down-hole scenarios. LIBS has in recent years become one of the “hot topics” of current research. An experimental and theoretical study of the application of LIBS in high pressures is required. While much study has been made of LIBS applied to surface covered in a thin water film (to concentrate the plasma generated), little has been done at depth. Wood Hole Oceanographic Institute has carried out early work in applying LIBS at depth with a view to analyse hydro-thermal vents as a demonstrator. The theoretical aspects will require knowledge of atomic physics, of plasma physics and of fluid mechanics including shock waves in fluids. This research will contribute to the commercial application of LIBS. It could be applied underwater to inspect oil pipes. This will make it a valuable tool in the oil industry.


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