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Title: Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition

Abstract

In this work, we study stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) in shock ignition by comparing fluid and particle-in-cell (PIC) simulations. Under typical parameters for the OMEGA experiments [Theobald et al., Phys. Plasmas 19, 102706 (2012)], a series of 1D fluid simulations with laser intensities ranging between 2 x 1015 and 2 x 1016W/cm2 finds that SBS is the dominant instability, which increases significantly with the incident intensity. Strong pump depletion caused by SBS and SRS limits the transmitted intensity at the 0.17nc to be less than 3.5 x 1015W/cm2. The PIC simulations show similar physics but with higher saturation levels for SBS and SRS convective modes and stronger pump depletion due to higher seed levels for the electromagnetic fields in PIC codes. Plasma flow profiles are found to be important in proper modeling of SBS and limiting its reflectivity in both the fluid and PIC simulations.

Authors:
 [1];  [2];  [2]; ORCiD logo [2];  [3]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Dept. of Mechanical Engineering; Inst. of Applied Physics and Computational Mathematics (IAPCM), Beijing (China)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Dept. of Mechanical Engineering
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics, Dept. of Physics and Astronomy and Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC)
Contributing Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
OSTI Identifier:
1470308
Alternate Identifier(s):
OSTI ID: 1246533
Grant/Contract Number:  
FC02-04ER54789; SC0012316; PHY-1314734; 11129503
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Hao, L., Li, J., Liu, W. D., Yan, R., and Ren, C. Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition. United States: N. p., 2016. Web. doi:10.1063/1.4945647.
Hao, L., Li, J., Liu, W. D., Yan, R., & Ren, C. Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition. United States. doi:10.1063/1.4945647.
Hao, L., Li, J., Liu, W. D., Yan, R., and Ren, C. Fri . "Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition". United States. doi:10.1063/1.4945647. https://www.osti.gov/servlets/purl/1470308.
@article{osti_1470308,
title = {Simulation of stimulated Brillouin scattering and stimulated Raman scattering in shock ignition},
author = {Hao, L. and Li, J. and Liu, W. D. and Yan, R. and Ren, C.},
abstractNote = {In this work, we study stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) in shock ignition by comparing fluid and particle-in-cell (PIC) simulations. Under typical parameters for the OMEGA experiments [Theobald et al., Phys. Plasmas 19, 102706 (2012)], a series of 1D fluid simulations with laser intensities ranging between 2 x 1015 and 2 x 1016W/cm2 finds that SBS is the dominant instability, which increases significantly with the incident intensity. Strong pump depletion caused by SBS and SRS limits the transmitted intensity at the 0.17nc to be less than 3.5 x 1015W/cm2. The PIC simulations show similar physics but with higher saturation levels for SBS and SRS convective modes and stronger pump depletion due to higher seed levels for the electromagnetic fields in PIC codes. Plasma flow profiles are found to be important in proper modeling of SBS and limiting its reflectivity in both the fluid and PIC simulations.},
doi = {10.1063/1.4945647},
journal = {Physics of Plasmas},
number = 4,
volume = 23,
place = {United States},
year = {2016},
month = {4}
}

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