High Velocity Impact Flash by porous impactors

Abstract

M. Yanagisawa and H. Ikegami (Univ. Electro-Communications, Tokyo, Japan), Impact flash efficiency in the high-velocity impact of porous materials: High-velocity impacts generate optical radiation (impact flash), and the optical energy divided by the kinetic energy of projectile is called "optical efficiency". We show that the efficiency is higher for porous projectile than for solid projectile in a preliminary one-dimensional collision model. We also speak about the laboratory experiments to confirm the higher efficiency for the porous projectile.