Shuichi Matsukiyo (Kyushu University)
Collisionless shocks often play important roles in various high energy phenomena in space. Shock reformation is a periodic collapse and formation process of the shock front occurring even when the upstream plasma is completely uniform and steady, and contributes to the generation of large amplitude waves and to particle acceleration. In this study we aim at the demonstration of shock reformation, which is not realized by the in-situ observation in space, by using the Gekko XII high power laser experiment at Institute of Laser Engineering (ILE), Osaka University. The results of experiment in 2019 will be reported.