LAUSR

The instability of ion acoustic waves due to the return current driven by an electron heat flux is a source of ion acoustic turbulence (IAT), which provides electromagnetic wave conversion into Langmuir waves at a near-critical density in inertial confinement fusion plasmas. The Langmuir waves triggered by IAT produce hot electrons. We formulate a theoretical model of hot-electron generation by these Langmuir waves and analyze it qualitatively. We show that IAT-driven hot electrons are generated in the backward direction and, therefore, preheat the target core because of the electron refluxing in the coronal plasma back toward the solid target.The instability of ion acoustic waves due to the return current driven by an electron heat flux is a source of ion acoustic turbulence (IAT), which provides electromagnetic wave conversion into Langmuir waves at a near-critical density in inertial confinement fusion plasmas. The Langmuir waves triggered by IAT produce hot electrons. We formulate a theoretical model of hot-electron generation by these Langmuir waves and analyze it qualitatively. We show that IAT-driven hot electrons are generated in the backward direction and, therefore, preheat the target core because of the electron refluxing in the coronal plasma back toward the solid target.