Characterization of the ballistic properties of ejecta from laser shock-loaded samples using high resolution picosecond laser imaging

摘要

A high resolution picosecond laser imaging diagnostic has been developed for making high-resolution spatial measurements of ejecta particles moving at high velocities (a few km.s(-1)). Preliminary results obtained with both visible (532 nm) and UV (355nm) lighting are presented for laser shock-driven tin ejecta experiments performed with different kind of surface defects. These results are compared with those obtained at LANL under high explosive loading using ultraviolet in-line Fraunhofer holography, and also with molecular dynamics (MD) simulations performed at lower space and time scales.