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Applied Physics A

, 98:219 | Cite as

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

  • G. CristoforettiEmail author
  • S. Legnaioli
  • V. Palleschi
  • E. Tognoni
  • P. A. Benedetti
Article

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.

PACS

79.20.Ds 52.38.Mf 52.50.Jm 42.62.Fi 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • G. Cristoforetti
    • 1
    Email author
  • S. Legnaioli
    • 1
  • V. Palleschi
    • 1
  • E. Tognoni
    • 1
  • P. A. Benedetti
    • 1
  1. 1.Applied Laser Spectroscopy Laboratory, Institute for Chemical-Physical ProcessesResearch Area of National Research CouncilPisaItaly

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