STP1117: Shockwave Detection, An Efficient Way to Determine Multiple-Pulse Damage Thresholds

    Petzoldt, S
    Fachbereich Physik, Freie Universität Berlin, Berlin,

    Elg, AP
    Fachbereich Physik, Freie Universität Berlin, Berlin,

    Reif, J
    Fachbereich Physik, Freie Universität Berlin, Berlin,

    Matthias, E
    Fachbereich Physik, Freie Universität Berlin, Berlin,

    Pages: 7    Published: Jan 1990


    Abstract

    The detection of damage associated shock pulses via the deflection of a probe laser beam is exploited to study multiple-shot damage thresholds in CaF2, PMMA, copper, and aluminium. We find a reduction of threshold intensity as compared to single-shot conditions. The experimental results point towards deviations from the previously postulated fluence dependence FN = F1NS-1 [see Ref.4]. They are, however, compatible with a simple model relating the threshold reduction to defect accumulation via non-linear energy absorption.

    Keywords:

    Multi-shot damage, probe beam deflection, defect accumulation


    Paper ID: STP26485S

    Committee/Subcommittee: E13.15

    DOI: 10.1520/STP26485S


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