Ablation driven by hot electrons in shock ignition

8th International Conference on Inertial Fusion Sciences and Applications

Piriz, A.R.^1 ; Rodriguez Prieto, G.^1 ; Tahir, N.A.^2 ; Zhao, Y.T.^3

E.T.S.I. Industriales, Instituto de Investigaciones Energéticas (INEI) and CYTEMA, Universidad de Castilla-La Mancha, Ciudad Real

13071, Spain^1

GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, Darmstadt

64291, Germany^2

Institute of Modern Physics, Chinese Academy of Science, Lanzhou

730000, China^3

关键词: Ablation fronts;    Ablation pressure;    Critical surfaces;    Energy couplings;    High laser intensities;    Laser wavelength;    Shock ignitions;    Target parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012087/pdf
DOI  :  10.1088/1742-6596/688/1/012087

来源: IOP

【 摘 要 】

An analytical model for the ablation driven by hot electrons is developed. The hot electrons are assumed to carry on the totality of the absorbed laser energy. Efficient energy coupling requires to keep the critical surface sufficiently close to the ablation front. To achieve this goal for high laser intensities a short enough laser wavelength is required. Scaling laws for the ablation pressure and the other relevant magnitudes of the ablation cloud are found in terms of the laser and target parameters.