Fig. 1

a Photograph of the Hayabusa2 sampler horn (Tachibana et al. 2014) and projector system with a schematic diagram showing the structure of the barrel, projectile, sabot, and explosive chamber (Sawada et al. 2017). b Schematic representation of the shooting operation of the projector system showing (1) the explosion, (2) acceleration, and (3) shot of the projectile