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Title: Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition

Here, we developed a new nonlinear fluid laser-plasma-instability code ( FLAME) using a multi-fluid plasma model combined with full electromagnetic wave equations. The completed one-dimensional version of FLAME was used to study laser-plasma instabilities in shock ignition. The simulations results showed that absolute stimulated Raman scattering (SRS) modes growing near the quarter-critical surface were saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. The ion-acoustic waves from LDI acted as seeds of Stimulated Brillouin Scattering, which displayed a bursting pattern and caused strong pump depletion. Re-scattering of SRS at the 1/16th-critical surface was also observed in a high temperature case. These results largely agreed with the corresponding Particle-in-Cell simulations.
Authors:
 [1] ;  [2] ; ORCiD logo [3] ;  [3] ;  [3]
  1. Univ. of Rochester, Rochester, NY (United States); Institute of Applied Physics and Computational Mathematics, Beijing (China)
  2. Univ. of Rochester, Rochester, NY (United States); Univ. of Science and Technology of China, Anhui (China)
  3. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Grant/Contract Number:
SC0012316
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 6; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Rochester, Rochester, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1474287

Hao, L., Yan, R., Li, J., Liu, W. D., and Ren, C.. Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition. United States: N. p., Web. doi:10.1063/1.4989702.
Hao, L., Yan, R., Li, J., Liu, W. D., & Ren, C.. Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition. United States. doi:10.1063/1.4989702.
Hao, L., Yan, R., Li, J., Liu, W. D., and Ren, C.. 2017. "Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition". United States. doi:10.1063/1.4989702. https://www.osti.gov/servlets/purl/1474287.
@article{osti_1474287,
title = {Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition},
author = {Hao, L. and Yan, R. and Li, J. and Liu, W. D. and Ren, C.},
abstractNote = {Here, we developed a new nonlinear fluid laser-plasma-instability code (FLAME) using a multi-fluid plasma model combined with full electromagnetic wave equations. The completed one-dimensional version of FLAME was used to study laser-plasma instabilities in shock ignition. The simulations results showed that absolute stimulated Raman scattering (SRS) modes growing near the quarter-critical surface were saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. The ion-acoustic waves from LDI acted as seeds of Stimulated Brillouin Scattering, which displayed a bursting pattern and caused strong pump depletion. Re-scattering of SRS at the 1/16th-critical surface was also observed in a high temperature case. These results largely agreed with the corresponding Particle-in-Cell simulations.},
doi = {10.1063/1.4989702},
journal = {Physics of Plasmas},
number = 6,
volume = 24,
place = {United States},
year = {2017},
month = {6}
}