SYMPOSIA PAPER Published: 01 January 1990
STP26485S

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

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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.

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Developed by Committee: E13
Pages: 180–186
DOI: 10.1520/STP26485S
ISBN-EB: 978-0-8031-5157-4
ISBN-13: 978-0-8031-4478-1