the experiment is also shown in black. It should be noted that previously reported experiments [@Huneault2018] related to this study used significantly thinner aluminized Mylar diaphragms (). The diaphragms had a lower reflectivity and a tendency to wrinkle which affected the PDV return signal, sometimes leading to noisy data or lost experiments. Increasing the Mylar thickness to improved the quality and consistency of the velocimetry data, and was not seen to affect the spall strength measurements.

![Typical spectrogram obtained from performing a sliding window FFT on the PDV data. The black curve is the evolution in the free-surface velocity as a function of time, which is obtained from the analysis.[]{data-label="fig:samplespectrogram"}](samplespectrogram.pdf){width="0.9\columnwidth"}

Analysis methods {#analysis}
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This section will outline the methods used to analyze the free-surface velocity of the target liquid in order to determine the maximum pressure in the liquid prior to unloading, the rate at which tension increases in the liquid prior to cavitation, and the maximum tension in the liquid (i.e., spall strength). A schematic of the wave diagram for the plate-impact experiment is shown in Fig. \[fig:wavediagram\](a). Initially, the impact drives a shock wave into both the driver plate and the flyer plate. The shock in the 