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Title: Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code

Abstract

Recent improvements to xRAGE, Los Alamos National Laboratory's Eulerian radiation-hydrodynamics code, have enabled the computation of laser-driven experiments relevant to inertial confinement fusion and high energy density physics. Here, previous directly driven cylindrical implosion experiments are modeled in order to benchmark xRAGE design simulations for future cylindrical implosion experiments, representing the first attempt to model such systems with an Eulerian code with adaptive mesh refinement. Simulations in 2D of transverse and axial cross-sections of the cylindrical target are performed, and the results are combined to form a 3D representation of the imploding cylinder. Synthetic radiographs are produced and analyzed from the simulation results, allowing for a direct comparison with experimentally measured quantities. The zeroth-order hydrodynamic trajectories of targets with no specified initial perturbation are well matched by the computations. Simulations of targets with a preimposed sinusoidal perturbation in the azimuthal direction show single-mode instability growth that is in agreement with the available data, but higher fidelity experimental measurements are required to enable more detailed comparisons. As a result, the mode growth observed in computations compares favorably with predictions of a linear theory for the ablative Rayleigh-Taylor instability.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1511622
Alternate Identifier(s):
OSTI ID: 1505878
Report Number(s):
LA-UR-18-31225
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Sauppe, Joshua Paul, Haines, Brian Michael, Palaniyappan, Sasikumar, Bradley, Paul Andrew, Batha, Steven H., Loomis, Eric Nicholas, and Kline, John L.. Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code. United States: N. p., 2019. Web. doi:10.1063/1.5083851.
Sauppe, Joshua Paul, Haines, Brian Michael, Palaniyappan, Sasikumar, Bradley, Paul Andrew, Batha, Steven H., Loomis, Eric Nicholas, & Kline, John L.. Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code. United States. doi:10.1063/1.5083851.
Sauppe, Joshua Paul, Haines, Brian Michael, Palaniyappan, Sasikumar, Bradley, Paul Andrew, Batha, Steven H., Loomis, Eric Nicholas, and Kline, John L.. Tue . "Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code". United States. doi:10.1063/1.5083851.
@article{osti_1511622,
title = {Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code},
author = {Sauppe, Joshua Paul and Haines, Brian Michael and Palaniyappan, Sasikumar and Bradley, Paul Andrew and Batha, Steven H. and Loomis, Eric Nicholas and Kline, John L.},
abstractNote = {Recent improvements to xRAGE, Los Alamos National Laboratory's Eulerian radiation-hydrodynamics code, have enabled the computation of laser-driven experiments relevant to inertial confinement fusion and high energy density physics. Here, previous directly driven cylindrical implosion experiments are modeled in order to benchmark xRAGE design simulations for future cylindrical implosion experiments, representing the first attempt to model such systems with an Eulerian code with adaptive mesh refinement. Simulations in 2D of transverse and axial cross-sections of the cylindrical target are performed, and the results are combined to form a 3D representation of the imploding cylinder. Synthetic radiographs are produced and analyzed from the simulation results, allowing for a direct comparison with experimentally measured quantities. The zeroth-order hydrodynamic trajectories of targets with no specified initial perturbation are well matched by the computations. Simulations of targets with a preimposed sinusoidal perturbation in the azimuthal direction show single-mode instability growth that is in agreement with the available data, but higher fidelity experimental measurements are required to enable more detailed comparisons. As a result, the mode growth observed in computations compares favorably with predictions of a linear theory for the ablative Rayleigh-Taylor instability.},
doi = {10.1063/1.5083851},
journal = {Physics of Plasmas},
number = 4,
volume = 26,
place = {United States},
year = {2019},
month = {4}
}

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Works referenced in this record:

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