On The Origin of Super-Hot Electrons from Intense Laser Interactions with Solid Targets having Moderate Scale Length Preformed Plasmas

摘要

We use PIC modeling to identify the acceleration mechanism responsible forthe observed generation of super-hot electrons in ultra-intense laser-plasmainteractions with solid targets with pre-formed plasma. We identify severalfeatures of direct laser acceleration (DLA) that drive the generation ofsuper-hot electrons. We find that, in this regime, electrons that becomesuper-hot are primarily injected by a looping mechanism that we callloop-injected direct acceleration (LIDA).