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

Sherlock, M.; Brodrick, J. P.; Ridgers, C. P.

doi:10.1063/1.4986095

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

Journal Article · Tue Aug 08 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4986095· OSTI ID:1438751

Sherlock, M. ^[1];

^[2]; Ridgers, C. P. ^[2]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of York, York (United Kingdom)

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1438751

Alternate ID(s):: OSTI ID: 1374228

Report Number(s):: LLNL-JRNL-730526; TRN: US1900512

Journal Information:: Physics of Plasmas, Vol. 24, Issue 8; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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