Langmuir probe study of plasma expansion in pulsed laser ablation

T.N. Hansen, Jørgen Schou, J.G. Lunney

    Research output: Contribution to journalJournal articleResearchpeer-review


    Langmuir probes were used to monitor the asymptotic expansion of the plasma produced by the laser ablation of a silver target in a vacuum. The measured angular and temporal distributions of the ion flux and electron temperature were found to be in good agreement with the self-similar isentropic and adiabatic solution of the gas dynamics equations describing the expansion. The value of the adiabatic index gamma was about 1.25, consistent with the ablation plume being a low temperature plasma.
    Original languageEnglish
    JournalApplied Physics A: Materials Science & Processing
    Issue numberS
    Pages (from-to)S601-S604
    Publication statusPublished - 1999


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