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Title: A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion

Abstract

Here, we compare the reduced non-local electron transport model developed to Vlasov-Fokker-Planck simulations. Two new test cases are considered: the propagation of a heat wave through a high density region into a lower density gas, and a one-dimensional hohlraum ablation problem. We find that the reduced model reproduces the peak heat flux well in the ablation region but significantly over-predicts the coronal preheat. The suitability of the reduced model for computing non-local transport effects other than thermal conductivity is considered by comparing the computed distribution function to the Vlasov-Fokker-Planck distribution function. It is shown that even when the reduced model reproduces the correct heat flux, the distribution function is significantly different to the Vlasov-Fokker-Planck prediction. Two simple modifications are considered which improve agreement between models in the coronal region.

Authors:
 [1]; ORCiD logo [2];  [2]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of York, York (United Kingdom)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438751
Alternate Identifier(s):
OSTI ID: 1374228
Report Number(s):
LLNL-JRNL-730526
Journal ID: ISSN 1070-664X; TRN: US1900512
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION

Citation Formats

Sherlock, M., Brodrick, J. P., and Ridgers, C. P. A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion. United States: N. p., 2017. Web. doi:10.1063/1.4986095.
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Sherlock, M., Brodrick, J. P., & Ridgers, C. P. A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion. United States. https://doi.org/10.1063/1.4986095
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Sherlock, M., Brodrick, J. P., and Ridgers, C. P. Tue . "A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion". United States. https://doi.org/10.1063/1.4986095. https://www.osti.gov/servlets/purl/1438751.
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@article{osti_1438751,
title = {A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion},
author = {Sherlock, M. and Brodrick, J. P. and Ridgers, C. P.},
abstractNote = {Here, we compare the reduced non-local electron transport model developed to Vlasov-Fokker-Planck simulations. Two new test cases are considered: the propagation of a heat wave through a high density region into a lower density gas, and a one-dimensional hohlraum ablation problem. We find that the reduced model reproduces the peak heat flux well in the ablation region but significantly over-predicts the coronal preheat. The suitability of the reduced model for computing non-local transport effects other than thermal conductivity is considered by comparing the computed distribution function to the Vlasov-Fokker-Planck distribution function. It is shown that even when the reduced model reproduces the correct heat flux, the distribution function is significantly different to the Vlasov-Fokker-Planck prediction. Two simple modifications are considered which improve agreement between models in the coronal region.},
doi = {10.1063/1.4986095},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {Tue Aug 08 00:00:00 EDT 2017},
month = {Tue Aug 08 00:00:00 EDT 2017}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.4986095
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Citation Metrics:
Cited by: 30 works
Citation information provided by
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Figures / Tables:

Figure 1 Figure 1: Heat Bath Problem: The electron temperatures at t=80ps. The initial temperature profile is also shown. (Note that the simulation box extends from 0$μm$ to 700$μm$, but we reduced the range of the x-axis in the plot to allow the gradient's features to be more visible).
All figures and tables (14 total)
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Works referenced in this record:

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journal, August 2015

  • Cao, Duc; Moses, Gregory; Delettrez, Jacques
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An implicit Vlasov–Fokker–Planck code to model non-local electron transport in 2-D with magnetic fields
journal, February 2004

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    Works referencing / citing this record:

    Testing nonlocal models of electron thermal conduction for magnetic and inertial confinement fusion applications
    journal, September 2017

    • Brodrick, J. P.; Kingham, R. J.; Marinak, M. M.
    • Physics of Plasmas, Vol. 24, Issue 9
    • DOI: 10.1063/1.5001079

    Measuring heat flux from collective Thomson scattering with non-Maxwellian distribution functions
    journal, March 2019

    • Henchen, R. J.; Sherlock, M.; Rozmus, W.
    • Physics of Plasmas, Vol. 26, Issue 3
    • DOI: 10.1063/1.5086753

    Validation of OSHUN against collisionless and collisional plasma physics
    journal, May 2018

    • Joglekar, Archis S.; Winjum, Benjamin J.; Tableman, Adam
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 6
    • DOI: 10.1088/1361-6587/aab978

    Incorporating kinetic effects on Nernst advection in inertial fusion simulations
    journal, June 2018

    • Brodrick, J. P.; Sherlock, M.; Farmer, W. A.
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 8
    • DOI: 10.1088/1361-6587/aaca0b

    Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport
    journal, July 2019

    Analytic insights into nonlocal energy transport. III. steady state Fokker Planck theory in spherical and planar geometry
    journal, January 2021

    • Manheimer, Wallace; Colombant, Denis
    • Physics of Plasmas, Vol. 28, Issue 1
    • DOI: 10.1063/5.0012825
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      Figures / Tables found in this record:

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