Jeudi 12 mai 2022 à 16 h 30
Sorbonne Université – IMPMC – 4 place Jussieu – 75005 Paris – Barre 22-23, 4e étage, pièce 401
Sébastien Le Pape – Laboratoire pour l’Utilisation des Lasers Intenses (LULI, Palaiseau)
Abstract
Fusion energy has been the driven force in the High Energy Density (HED) community for more than fifty years but especially since the start of the National Ignition Campaign in 2009 on the National Ignition facility (LLNL, USA). The National Ignition Campaign, though a marvel in term of laser technology and data quality in this challenging regime, has failed to achieve ignition. This failure has shed lights on gaps of our understanding of fundamental plasma properties such as thermal transport or emissivity. Following these initial difficulties, evolution of the design (higher adiabat, new ablator, new hohlraum conditions) has led to significant improvement in implosion performance over the years and finally to performance close to ignition (Q=0.7) in the summer of 2021. I will go over these evolutions and why they led to the recent successes obtained on the NIF.
