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Proceedings Paper

Numerical modeling of laser-matter interaction
Author(s): Jan Marczak; Karol Jach; Antoni Sarzynski
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Paper Abstract

Laser radiation is often used in cleaning and conservation of artworks. Interaction of laser radiation with matter is so sophisticated process that analytical solutions rarely bring the valuable formulas. Even numerical methods seldom give quantitative insight into the physics of processes. Chemical and physical properties of surface impurity layers may change from point to point within the same sample. Absorption coefficient of the layers depends on such factors as weather or air humidity. In spite of this, theoretical description of laser cleaning is necessary, as it allows to explain some characteristic features of processes under investigation. In this work we present a model for laser pulse interaction with graphite layer placed on aluminium substrate. The model is limited to one dimensional hydrodynamic equations. The following phenomena are included into the model: absorption and reflection of laser radiation, heat conductivity, radiation transport in grey body approximation, shock waves, ionisation and the elastic properties of the media. Numerical calculations and experimental results give a qualitative agreement.

Paper Details

Date Published: 9 October 2003
PDF: 11 pages
Proc. SPIE 5146, Optical Metrology for Arts and Multimedia, (9 October 2003);
Show Author Affiliations
Jan Marczak, Military Univ. of Technology (Poland)
Karol Jach, Military Univ. of Technology (Poland)
Antoni Sarzynski, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 5146:
Optical Metrology for Arts and Multimedia
Renzo Salimbeni, Editor(s)

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