skip to main content

DOE PAGESDOE PAGES

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

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]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of York, York (United Kingdom)
Publication Date:
Report Number(s):
LLNL-JRNL-730526
Journal ID: ISSN 1070-664X
Grant/Contract Number:
AC52-07NA27344
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)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1438751
Alternate Identifier(s):
OSTI ID: 1374228

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., Web. doi:10.1063/1.4986095.
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. doi:10.1063/1.4986095.
Sherlock, M., Brodrick, J. P., and Ridgers, C. P.. 2017. "A comparison of non-local electron transport models for laser-plasmas relevant to inertial confinement fusion". United States. doi:10.1063/1.4986095. https://www.osti.gov/servlets/purl/1438751.
@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 = {2017},
month = {8}
}