date: 2010 December 22 (Wed) 16:00-17:00
room: Kobe University, Science and Technology Research Building #4-809
speaker: Toshihiko Kadono (Osaka University)
organizer: Ayako Suzuki
title: Hypervelocity impact experiments using high-power laser
abstract: Impact velocity of meteorites on planetary and satellite surfaces at the final stage of planetary accretion becomes more than 10 km/s. However, the details of the effects by such impacts on the environments have not been understood well yet. The reasons are probably that macroscopic (> ~ 0.1 mm) flyers are not easily accelerated to more than 10 km/s in laboratories. This makes it difficult to investigate experimentally the impact phenomenon with impact velocities higher than 10 km/s. In this presentation, we show that, using a high-power laser, higher impact velocities than 10 km/s can be achieved using sheet flyers with a diameter of ~ 0.5 mm and a thickness of ~ 50 mm and spherical projectiles with a diameter of 0.1 - 0.3 mm.