New perspective of impact processes among planetary bodies by means of the flash X-ray transmission method

本文介绍了一对300kV电压的闪光X射线系统，用于研究行星体高速碰撞过程中的瞬态现象，并试图用这些装置建立一个研究撞击坑形成过程的新视角。然后，我们成功地观察到了弹丸的撞击穿透和伴随着这种穿透的弹坑形成。在弹丸侵彻多孔靶和成坑的实验室实验、成坑过程中开挖流场的数值模拟以及弹着点处弹丸扩展的观测等方面取得了一些新的成果。

We have introduced a pair of flash X-ray system with the applied voltage of 300kV in order to study the transient phenomena during the high velocity collision among planetary bodies, and we have tried to construct a new perspective of an impact cratering process by means of these apparatus. Then, we succeeded to observe the impact penetration of a projectile and the crater formation accompanied by this penetration. As a result, we have obtained several new results on the laboratory experiments of the projectile penetration and the crater formation on the porous target, the numerical simulation of the excavation flow during the crater formation, and the observation of the ejecta-expansion from the impact point.