In Shock Ignition (SI), an alternative scheme for Inertial Confinement Fusion, the role of hot electrons (HE) produced by parametric instabilities generated during the interaction between the large preformed plasma and the high intensity spike laser, could be beneficial or detrimental. To study their impact, we performed an experiment on the LMJ-PETAL laser facility to produce strong shock with plasma conditions relevant for the SI approach. To evaluate the effect of the HE on the shock strength, the laser temporal smoothing (SSD) is either switched on or off.
We present here results obtained during the first campaign (April 2019) dedicated to the HE characterization where several diagnostics based on the X-ray emission associated to HE are used to evaluate the HE population. We present also the preliminary results of the second campaign (March 2020) dedicated to the observation of hot electron effect on the shock propagation and to the estimate of parametric instabilities level.
This work is supported by Institute Laser & Plasma and has been conducted within the framework of the EUROFusion consortium via the Enabling Research Projects ENR-IFE15.CEA-02 and ENR-IFE19.CEA-01.
|Country or International Organization||France|