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

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4945647· OSTI ID:1470308
 [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

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.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
Contributing Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Grant/Contract Number:
FC02-04ER54789; SC0012316; PHY-1314734; 11129503
OSTI ID:
1470308
Alternate ID(s):
OSTI ID: 1246533
Journal Information:
Physics of Plasmas, Vol. 23, Issue 4; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (8)

Effects of laser-plasma instabilities on hydro evolution in an OMEGA-EP long-scale-length experiment journal February 2017
Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition journal June 2017
Investigation on laser plasma instability of the outer ring beams on SGIII laser facility journal September 2019
Stimulated Brillouin scattering behaviors in multi-ion species plasmas in high-temperature and high-density region journal May 2019
Anti-Stokes scattering and Stokes scattering of stimulated Brillouin scattering cascade in high-intensity laser–plasma interaction journal May 2017
On the stimulated Raman sidescattering in inhomogeneous plasmas: revisit of linear theory and three-dimensional particle-in-cell simulations journal January 2018
Anti-Stokes scattering and Stokes scattering of stimulated Brillouin scattering cascade in high-intensity laser-plasmas interaction text January 2017
Nonlinear Fluid Simulation Study of Stimulated Raman and Brillouin Scatterings in Shock Ignition text January 2017

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