PDV-based estimation of high-speed ejecta particles density from shock-loaded tin plate

In the context of ejecta particle experiments created from shock-wave loading a metallic surface with machining grooves, we present a method to estimate the areal mass Ms (mg.cm–2) of the particle cloud from non-invasive PDV velocimetry diagnostic. Through the statistical properties of the time-velocity PDV spectrogram, the set of parameters most likely to have generated experimental PDV data is estimated. This approach is detailed on an experiment consisting of a 1-mm thick tin surface with 2D triangular known surface patterns (period of 60 µm and peak-to-peak amplitude of 8 µm) explosively driven by an electro-detonator with a peak breakout pressure of approximately 29 GPa at the metal-vacuum interface.