Ion dynamics in laser ablation plumes from selected metals at 355 nm

Birgitte Thestrup Nielsen, Bo Toftmann Christensen, Jørgen Schou, B. Doggett, J.G. Lunney

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The dynamics of ions in a laser ablation plume from a number of metals irradiated by a ns-second pulse at 355 nm has been studied. The time-of-flight signals peak at flight times corresponding to velocities between 30 and 10 km/s with decreasing values for increasing atomic masses. The angular distributions of the integrated ion signals are strongly peaked in forward direction, and the values for the volatile Bi are somewhat higher than those for the other metals. The distributions have been analyzed on the basis of Anisimov's expansion model. The fraction of ionized atoms can be estimated from weight loss measurements and is about 0.5 for Ag and Al and 0.15 for Bi at a fluence of 2.5 J/cm(2). (C) 2002 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalApplied Surface Science
    Volume197-198
    Issue number30
    Pages (from-to)175-180
    ISSN0169-4332
    DOIs
    Publication statusPublished - 2002

    Keywords

    • Laser irradiation
    • Plume expansion
    • Ions

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