Studies of craters' dimension for long-pulse laser ablation of metal targets at various experimental conditions

D. Margarone*, L. Láska, L. Torrisi, S. Gammino, J. Krása, E. Krouský, P. Parys, M. Pfeifer, K. Rohlena, M. Rosiñski, L. Ryc, J. Skála, J. Ullschmied, A. Velyhan, J. Wolowski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Long pulse laser shots of the PALS iodine laser in Prague have been used to obtain metal target ablation at various experimental conditions. Attention is paid mainly to the dependencies of the crater diameter on the position of minimum laser-focus spot with regard to the target surface, by using different laser wavelengths and laser energies. Not only a single one, but two minima, independently of the wavelength, of the target irradiation angle and of the target material, were recorded. Significant asymmetries, ascribed to the non-linear effects of intense laser beam with pre-formed plasma, were found, too. Estimations of ejected mass per laser pulse are reported and used to calculate the efficiency of laser-driven loading. Results on metal target ablation and crater formation at high intensities (from 2 × 10 13 to 3 × 10 16 W/cm 2 ) are presented and compared. Crater depth, crater diameter and etching yield are reported versus the laser energy, in order to evaluate the ablation threshold fluence.

Original languageEnglish
Pages (from-to)2797-2803
Number of pages7
JournalApplied Surface Science
Volume254
Issue number9
DOIs
Publication statusPublished - 28 Feb 2008
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Ablation threshold
  • Craters
  • Focus position
  • Laser-plasmas

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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