Comparison between time-of-flight measurements and numerical simulations for laser-generated plasmas

N. Gambino*, D. Mascali, R. Miracoli, S. Gammino, D. Margarone, F. Musumeci, S. Tudisco, L. Torrisi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The modeling of laser-generated plasmas can be carried out by means of different theoretical approaches. Hydrodynamic simulations have the advantage of treating the plasma as a continuous fluid that expands in vacuum with a high Mach number. We used the analytical Anisimov model for the numerical simulations of a plasma expanding at supersonic velocities. The model describes the plume by means of a special solution of the gas dynamical equations on the hypothesis that the flow expands adiabatically. Here, we carry out a comparative analysis between experimental and numerical results: the model fits the experimental data for monoatomic plumes quite well. More specifically, the numerical data have been tested by comparing the time-of-flight signals obtained at the INFN-LNS in Catania from a pure metallic target. A Coulomb drift velocity was added to the expansion velocity, and only in this way was it possible to explain the experimental results, thus confirming the presence of self-generated electrostatic fields inside the expanding plasma plume.

Original languageEnglish
Pages (from-to)543-550
Number of pages8
JournalRadiation Effects and Defects in Solids
Volume165
Issue number6-10
DOIs
Publication statusPublished - Jun 2010
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.

Keywords

  • Adiabatic expansion
  • Gas dynamical equations
  • Time of flight

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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