X-ray time-resolved diagnostics of hot electron generation in shock ignition relevant experiments

The work is dedicated to the investigation of a hot electron generation in a shock ignition relevant experiment by means of x-ray time-resolved diagnostics. Nowadays, the shock ignition approach is one of the most promising methods to realize inertial confinement fusion and to achieve a new energetic source in the world. The mechanisms of a hot electron generation have a crucial role in this case and are insufficiently investigated due to the short temporal scales close to the laser pulse time. Here we report about the x-ray time resolved study of this phenomenon applying the imager based on spherically-bent Bragg crystals combined with an x-ray streak camera of high temporal resolution. We demonstrate the absolute timing of the registered x-ray emission caused by hot electrons as well as dynamics of the spatial and temporal characteristics varying the parameters of the laser pulse with an intensity up to 2e16 W/cm
²
.