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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

APINANIZ, Jon I; MARTINEZ, Roberto; LONGARTE, Asier  y  CASTANO, Fernando. Characterization of Kinetic Energy Distributions of Ions Produced by Laser Ablation Of Metals. Inf. tecnol. [online]. 2009, vol.20, n.2, pp.3-11. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642009000200002.

Kinetic energy distributions have been determined for ions produced by laser ablation with 532 nm nanosecond pulses on Al, Cu and Fe in vacuum. The experiments were carried out in a mass spectrometer that includes an electrostatic energy analyzer and a flight tube. The energy profiles obtained  fit Maxwell-Boltzmann distributions with a Coulomb component, which reveals that ions are accelerated by the intense electric field produced after electrons are emitted. While at low laser fluences simple distributions are observed, the behaviour is more complex at higher fluences, due to the presence of recombination and ionization processes. The study of these energy distributions allows obtaining valuable information about the processes that produce the ions and of the best experimental conditions necessary to produce ion beams with specific kinetic energies for technological applications.

Palabras clave : laser ablation; plasmas; kinetic energies; metal ionizations; ions.

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