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Crater drilling enhancement obtained in parallel non-collinear double-pulse laser ablation

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Abstract

In order to investigate the double-pulse ablation mechanism, two parallel but non-collinear laser beams, delayed with respect to each other by 1 μs, were focussed on an aluminium sample, so that a lateral distance of 600 microns exists between the centres of the two craters and no superposition of the laser-ablation zones is present. The use of such configuration results in a signal and in a plasma mass enhancement with respect to the single-pulse case almost equal to that obtained in the double-pulse collinear case. However, such a non-collinear geometry evidences a much more effective drilling of the surface. Such unexpected drilling seems to be related to a hydrodynamic drainage out of aerosol and molten material, hindering its re-deposition in and around the crater.

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Authors and Affiliations

  1. Applied Laser Spectroscopy Laboratory, Institute for Chemical-Physical Processes, Research Area of National Research Council, Via G. Moruzzi, 1, 56124, Pisa, Italy

    G. Cristoforetti, S. Legnaioli, V. Palleschi, E. Tognoni & P. A. Benedetti

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  1. G. Cristoforetti
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  2. S. Legnaioli
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  3. V. Palleschi
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  4. E. Tognoni
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  5. P. A. Benedetti
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Correspondence to G. Cristoforetti.

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Cristoforetti, G., Legnaioli, S., Palleschi, V. et al. Crater drilling enhancement obtained in parallel non-collinear double-pulse laser ablation. Appl. Phys. A 98, 219 (2010). https://doi.org/10.1007/s00339-009-5379-8

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  • DOI: https://doi.org/10.1007/s00339-009-5379-8

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