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

Year: 2020

Authors: Baton S.D., Colaïtis A., Rousseaux C., Boutoux G., Brygo C., Jacquet L., Koenig M., Batani D., Casner A., Le Bel E., Raffestin D., Tentori A., Tikhonchuk V., Trela J., Reverdin C., Le-Deroff L., Theobald W., Cristoforetti G., Gizzi LA., Koester P., Labate L., Shigemori K.

Autors Affiliation: a Laboratoire pour l’Utilisation des Lasers Intenses, LULI, CNRS-Ecole Polytechnique-CEA-Sorbonne Universités, UMR 7605, F-91128 Palaiseau, France
b Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
c CEA, DAM, DIF, F-91297 Arpajon, France
d CEA, DAM, CESTA, F-33114 Le Barp, France
e Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
f Intense Laser Irradiation Laboratory, CNR-INO, Pisa, Italy
g Institute of Laser Engineering, University of Osaka, 565-0871, Japan

Abstract: 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.


Volume: 36      Pages from: 100796-1  to: 100796-7

KeyWords: Shock Ignition, Inertial Confinement Fusion, Stimulated Raman Scattering