Preliminary results from the LMJ-PETAL experiment on hot electrons characterization in the context of Shock Ignition

In the Shock Ignition scheme, the spike pulse intensity is well above the threshold of parametric instabilities, which produce a considerable amount of hot electrons that could be beneficial or detrimental to the ignition. To study their impact, an experiment has been carried out on the LMJ-PETAL facility with a goal to generate a strong shock inside a plastic layer under plasma conditions relevant to full-scale shock ignition targets. To evaluate the effect of hot electrons on the shock characteristics, laser temporal smoothing was either switched on or off, which in turns varies the quantity of hot electrons being generated. In this paper, we present preliminary results obtained during the experiment dedicated to the hot electron characterization. We present also calculations for the second part of the experiment, scheduled in 2020 and focused on the shock characterization.Diagnostics Plasma pour l'installation PETAL sur le LMJInitiative d'excellence de l'Université de BordeauxEUROfusion - Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortiumNuméro CORDIS : 63305

Progress in understanding the role of hot electrons for the shock ignition approach to inertial confinement fusion

This paper describes the results of a series of experiments conducted with the PALS laser at intensities of interest for the shock ignition approach to inertial fusion. In particular, we addressed the generation of hot electrons (HE) (determining their average energy and number), as well as the parametric instabilities which are producing them. In addition, we studied the impact of HE on the formation and dynamics of strong shocks

Progress in understanding the role of hot electrons for the shock ignition approach to Inertial Confinement Fusion

This paper describes the results of a series of experiments conducted with the PALS laser at intensities of interest for the shock ignition approach to inertial fusion. In particular, we addressed the generation of hot electrons (determining their average energy and number), as well as the parametric instabilities which are producing them. In addition, we studied the impact of hot electrons on the formation and dynamics of strong shocks