Abstract
Flyer acceleration technique using high-power lasers has several advantages such as the achieved velocities higher than 10 km/s and non-contamination to the products generated by impacts. In this study, we show that a high-power laser can achieve flyer velocities higher than 10 km/s up to 60 km/s using spherical projectiles with a diameter of 0.1 − 0.3mm. We discuss the projectile condition during the flight based on the results of numerical simulations.
Highlights
Impact experiments in planetary sciences have been mainly carried out with two-stage light-gas guns, with which macroscopic ( 0.1 mm) projectiles are not accelerated to more than 10 km/s
Flyer acceleration technique using high-power lasers has several advantages such as the achieved velocities higher than 10 km/s and non-contamination to the products generated by impacts
We show that a high-power laser can achieve flyer velocities higher than 10 km/s up to 60 km/s using spherical projectiles with a diameter of 0.1 − 0.3 mm
Summary
Impact experiments in planetary sciences have been mainly carried out with two-stage light-gas guns, with which macroscopic ( 0.1 mm) projectiles are not accelerated to more than 10 km/s. For planetary interest, the impacts of projectiles with an aspect ratio of ∼1 at velocities higher than ∼10 km/s are highly desirable, we have developed a laser-gun, which can accelerate aluminium (Al) spheres to velocities higher than 10 km/s [11,12,13,14]. Based on this flyer acceleration technique, the experiments of the impact vaporization and the investigation of the chemical compositions of the vapor. We discuss the thermodynamic conditions of projectiles based on the numerical results
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