Contribution of material's surface layer on charge state distribution in laser ablation plasma

Masafumi Kumaki, Dannie Steski, Shunsuke Ikeda, Takeshi Kanesue, Masahiro Okamura, Masakazu Washio

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    To generate laser ablation plasma, a pulse laser is focused onto a solid target making a crater on the surface. However, not all the evaporated material is efficiently converted to hot plasma. Some portion of the evaporated material could be turned to low temperature plasma or just vapor. To investigate the mechanism, we prepared an aluminum target coated by thin carbon layers. Then, we measured the ablation plasma properties with different carbon thicknesses on the aluminum plate. The results showed that C6+ ions were generated only from the surface layer. The deep layers (over 250 nm from the surface) did not provide high charge state ions. On the other hand, low charge state ions were mainly produced by the deeper layers of the target. Atoms deeper than 1000 nm did not contribute to the ablation plasma formation.

    Original languageEnglish
    Article number02A921
    JournalReview of Scientific Instruments
    Volume87
    Issue number2
    DOIs
    Publication statusPublished - 2016 Feb 1

    ASJC Scopus subject areas

    • Instrumentation

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