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Title: The role of hot electrons in the dynamics of a laser-driven strong converging shock

Experiments on strong shock excitation in spherical plastic targets conducted at the Omega Laser Facility are interpreted with the radiation–hydrodynamics code CHIC to account for parametric instabilities excitation and hot-electron generation. The effects of hot electrons on the shock-pressure amplification and upstream preheat are analyzed. In this study, it is demonstrated that both effects contribute to an increase in shock velocity. Comparison of the measured laser reflectivity and shock flash time with numerical simulations make it possible to reconstitute the time history of the ablation and shock pressures. Finally, consequences of this analysis for the shock-ignition target design are discussed.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1] ;  [2] ;  [3] ; ORCiD logo [3] ;  [3]
  1. University of Bordeaux-CNRS-CEA (France). Centre Lasers Intenses et Applications
  2. University of Bordeaux-CNRS-CEA (France). Centre Lasers Intenses et Applications; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of Rochester, NY (United States). Laboratory for Laser Energetics and Fusion Science Center
Publication Date:
Report Number(s):
2017-220; 1364
Journal ID: ISSN 1070-664X; 2017-220, 2320, 1364; TRN: US1800923
Grant/Contract Number:
NA0001944; FC02-04ER54789
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 11; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1416325

Llor Aisa, E., Ribeyre, X., Duchateau, G., Nguyen-Bui, T., Tikhonchuk, V. T., Colaïtis, A., Betti, R., Bose, A., and Theobald, W.. The role of hot electrons in the dynamics of a laser-driven strong converging shock. United States: N. p., Web. doi:10.1063/1.5003814.
Llor Aisa, E., Ribeyre, X., Duchateau, G., Nguyen-Bui, T., Tikhonchuk, V. T., Colaïtis, A., Betti, R., Bose, A., & Theobald, W.. The role of hot electrons in the dynamics of a laser-driven strong converging shock. United States. doi:10.1063/1.5003814.
Llor Aisa, E., Ribeyre, X., Duchateau, G., Nguyen-Bui, T., Tikhonchuk, V. T., Colaïtis, A., Betti, R., Bose, A., and Theobald, W.. 2017. "The role of hot electrons in the dynamics of a laser-driven strong converging shock". United States. doi:10.1063/1.5003814.
@article{osti_1416325,
title = {The role of hot electrons in the dynamics of a laser-driven strong converging shock},
author = {Llor Aisa, E. and Ribeyre, X. and Duchateau, G. and Nguyen-Bui, T. and Tikhonchuk, V. T. and Colaïtis, A. and Betti, R. and Bose, A. and Theobald, W.},
abstractNote = {Experiments on strong shock excitation in spherical plastic targets conducted at the Omega Laser Facility are interpreted with the radiation–hydrodynamics code CHIC to account for parametric instabilities excitation and hot-electron generation. The effects of hot electrons on the shock-pressure amplification and upstream preheat are analyzed. In this study, it is demonstrated that both effects contribute to an increase in shock velocity. Comparison of the measured laser reflectivity and shock flash time with numerical simulations make it possible to reconstitute the time history of the ablation and shock pressures. Finally, consequences of this analysis for the shock-ignition target design are discussed.},
doi = {10.1063/1.5003814},
journal = {Physics of Plasmas},
number = 11,
volume = 24,
place = {United States},
year = {2017},
month = {11}
}