EXPERIMENTAL STUDY OF EJECTA ON LEAD SURFACE AT DIFFERENT LOADING RATES AND AMPLITUDES

We conducted experiments to study the ejecta from explosively shocked Pb targets. In the experiments we diagnose the ejected mass and dynamic system through use of piezoelectric pins, optical fiber probes, Asay foils, Asay windows, laser Doppler velocimetry, and high speed photography. The mass, the density distribution and the corresponding velocity distribution of micro-spall fragments of the Pb target are presented. We also study the sensitivity of Pb ejecta production to the loading rate and the peak shock stress.