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Title: Ensemble simulations of inertial confinement fusion implosions

The achievement of inertial confinement fusion ignition on the National Ignition Facility relies on the collection and interpretation of a limited (and expensive) set of experimental data. These data are therefore supplemented with state-of-the-art multi-dimensional radiation-hydrodynamic simulations to provide a better understanding of implosion dynamics and behavior. We present a relatively large number (~4000) of systematically perturbed 2D simulations to probe our understanding of low-mode fuel and ablator asymmetries seeded by asymmetric illumination. We find that Gaussian process surrogate models are able to predict both the total neutron yield and the degradation in performance due to asymmetries. Furthermore, the surrogates are then applied to simulations containing new sources of degradation to quantify the impact of the new source.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-PROC-694784
Journal ID: ISSN 1932-1864
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Statistical Analysis and Data Mining
Additional Journal Information:
Journal Volume: 10; Journal Issue: 4; Conference: Conference on Data Analysis, Santa Fe, NM (United States), 2-4 Mar 2016; Journal ID: ISSN 1932-1864
Publisher:
Wiley
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; Hydrodynamics; Gaussian process; Instrument Variable
OSTI Identifier:
1346130

Nora, Ryan, Peterson, Jayson Luc, Spears, Brian Keith, Field, John Everett, and Brandon, Scott. Ensemble simulations of inertial confinement fusion implosions. United States: N. p., Web. doi:10.1002/sam.11344.
Nora, Ryan, Peterson, Jayson Luc, Spears, Brian Keith, Field, John Everett, & Brandon, Scott. Ensemble simulations of inertial confinement fusion implosions. United States. doi:10.1002/sam.11344.
Nora, Ryan, Peterson, Jayson Luc, Spears, Brian Keith, Field, John Everett, and Brandon, Scott. 2017. "Ensemble simulations of inertial confinement fusion implosions". United States. doi:10.1002/sam.11344. https://www.osti.gov/servlets/purl/1346130.
@article{osti_1346130,
title = {Ensemble simulations of inertial confinement fusion implosions},
author = {Nora, Ryan and Peterson, Jayson Luc and Spears, Brian Keith and Field, John Everett and Brandon, Scott},
abstractNote = {The achievement of inertial confinement fusion ignition on the National Ignition Facility relies on the collection and interpretation of a limited (and expensive) set of experimental data. These data are therefore supplemented with state-of-the-art multi-dimensional radiation-hydrodynamic simulations to provide a better understanding of implosion dynamics and behavior. We present a relatively large number (~4000) of systematically perturbed 2D simulations to probe our understanding of low-mode fuel and ablator asymmetries seeded by asymmetric illumination. We find that Gaussian process surrogate models are able to predict both the total neutron yield and the degradation in performance due to asymmetries. Furthermore, the surrogates are then applied to simulations containing new sources of degradation to quantify the impact of the new source.},
doi = {10.1002/sam.11344},
journal = {Statistical Analysis and Data Mining},
number = 4,
volume = 10,
place = {United States},
year = {2017},
month = {5}
}