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Title: A tesselation-based model for intensity estimation and laser plasma interactions calculations in three dimensions

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5020385· OSTI ID:1469462
 [1];  [2]; ORCiD logo [2];  [2];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Here, a three-dimensional laser propagation model for computation of laser-plasma interactions is presented. It is focused on indirect drive geometries in inertial confinement fusion and formulated for use at large temporal and spatial scales. A modified tesselation-based estimator and a relaxation scheme are used to estimate the intensity distribution in plasma from geometrical optics rays. Comparisons with reference solutions show that this approach is well-suited to reproduce realistic 3D intensity field distributions of beams smoothed by phase plates. It is shown that the method requires a reduced number of rays compared to traditional rigid-scale intensity estimation. Using this field estimator, we have implemented laser refraction, inverse-bremsstrahlung absorption, and steady-state crossed-beam energy transfer with a linear kinetic model in the numerical code VAMPIRE. Probe beam amplification and laser spot shapes are compared with experimental results and pf3d paraxial simulations. These results are promising for the efficient and accurate computation of laser intensity distributions in holhraums, which is of importance for determining the capsule implosion shape and risks of laser-plasma instabilities such as hot electron generation and backscatter in multi-beam configurations.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; AC52- 07NA27344
OSTI ID:
1469462
Alternate ID(s):
OSTI ID: 1429577
Report Number(s):
LLNL-JRNL-756307; 943612
Journal Information:
Physics of Plasmas, Vol. 25, Issue 3; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (3)

Real and complex valued geometrical optics inverse ray-tracing for inline field calculations journal March 2019
Ultra-high (>30%) coupling efficiency designs for demonstrating central hot-spot ignition on the National Ignition Facility using a Frustraum journal August 2019
Adaptive inverse ray-tracing for accurate and efficient modeling of cross beam energy transfer in hydrodynamics simulations journal July 2019

Figures / Tables (12)

FIG. 1.(p. 4)figure FIG. 1.
FIG. 2.(p. 7)figure FIG. 2.
FIG. 3.(p. 8)figure FIG. 3.
FIG. 4.(p. 10)figure FIG. 4.
FIG. 5.(p. 10)figure FIG. 5.
FIG. 6.(p. 11)figure FIG. 6.
FIG. 7.(p. 12)figure FIG. 7.
FIG. 8.(p. 13)figure FIG. 8.
FIG. 9.(p. 14)figure FIG. 9.
FIG. 10.(p. 15)figure FIG. 10.
FIG. 11.(p. 15)figure FIG. 11.
Figure 12(p. 17)figure Figure 12

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
kinetic theory
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laser plasma interactions