Three dimensional number density mapping in the plume of a low temperature laser ablated magnesium plasma

G.W. Martin, L.A. Doyle, A. Al-Khateeb, I. Weaver, David Riley, M. J. Lamb, T. Morrow, Ciaran Lewis

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Simultaneous optical absorption and laser-induced fluorescence measurements have been used to map the three-dimensional number densities of ground-state ions and neutrals within a low-temperature KrF laser-produced magnesium plasma expanding into vacuum. Data is reported for the symmetry plane of the plasma, which includes the laser interaction point at a delay of 1 μs after the ∼30 ns KrF laser ablation pulse and for a laser fluence of 2 J cm−2 on target. The number density distributions of ion and neutral species within this plane indicate that two distinct regions exist within the plume; one is a fast component containing ions and neutrals at maximum densities of ∼3×1013 cm−3 and ∼4×1012 cm−3, respectively and the second is a high-density region containing slow neutral species, at densities up to ∼1×1015 cm−3.
Original languageEnglish
Pages (from-to)710-715
Number of pages6
JournalApplied Surface Science
Volume127-129
DOIs
Publication statusPublished - May 1998
Event4th International Conference on Laser Ablation (COLA 97) - MONTEREY BAY, United States
Duration: 21 Jul 199725 Jul 1997

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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