Development of a Non‐Radiographic Spall and Damage Diagnostic

A new, non‐radiographic diagnostic has been developed that appears to provide information on multiple spall and damage layers in metals. The velocities of multiple layers (up to 5 in copper) can be determined using this method, with additional information possible on damaged material between layers at densities less than the bulk metal value. Metals that are melted on release (tin) also seem to exhibit a distinctive signature that is quite different from conventional multi‐layer spall. Experimental results on these metals and proton radiographs confirming these results are also presented.