Diagnostics of laser ablated plasma plumes

S. Amoruso, B. Toftmann, Jørgen Schou, R. Velotta, X. Wang

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    The effect of an ambient gas on the expansion dynamics of laser ablated plasmas has been studied for two systems by exploiting different diagnostic techniques. First, the dynamics of a MgB2 laser produced plasma plume in an Ar atmosphere has been investigated by space-and time-resolved optical emission spectroscopy. Second, deposition rate and fast ion probe measurements have been used to study the plume propagation dynamics during laser ablation of a silver target, over a large range of Ar background gas pressures (from high vacuum to approximate to 100 Pa). A comparative analysis of the experimental results allows us to identify different regimes of the plume expansion, going from a free plume at low pressure, through collisional and shockwave like hydrodynamic regimes at intermediate pressure, finally reaching a confined plume with subsequent thermalization of the plume particles at the largest pressure of the background gas. The experimental findings also show that a combination of complementary techniques, like optical emission spectroscopy, close to the target, and fast ion probe and deposition rate measurements at larger distances, can lead to a more detailed understanding of the laser ablated plasma plume propagation in a background gas. (C) 2003 Elsevier B.V All rights reserved.
    Original languageEnglish
    JournalThin Solid Films
    Volume453-54
    Pages (from-to)562-572
    ISSN0040-6090
    DOIs
    Publication statusPublished - 1 Apr 2004
    EventE-MRS 2003 Spring Conference: Symposium H on Photonic Processing of Surfaces, Thin Films and Devices - Strasbourg, France
    Duration: 10 Jun 200313 Jun 2003

    Conference

    ConferenceE-MRS 2003 Spring Conference
    CountryFrance
    CityStrasbourg
    Period10/06/200313/06/2003

    Keywords

    • laser ablation
    • spectroscopy
    • electrical probe
    • plume dynamics

    Cite this

    Amoruso, S., Toftmann, B., Schou, J., Velotta, R., & Wang, X. (2004). Diagnostics of laser ablated plasma plumes. Thin Solid Films, 453-54, 562-572. https://doi.org/10.1016/j.tsf.2003.11.137