Capsule modeling of high foot implosion experiments on the National Ignition Facility
Abstract
This study summarizes the results of detailed, capsule-only simulations of a set of high foot implosion experiments conducted on the National Ignition Facility (NIF). These experiments span a range of ablator thicknesses, laser powers, and laser energies, and modeling these experiments as a set is important to assess whether the simulation model can reproduce the trends seen experimentally as the implosion parameters were varied. Two-dimensional (2D) simulations have been run including a number of effects—both nominal and off-nominal—such as hohlraum radiation asymmetries, surface roughness, the capsule support tent, and hot electron pre-heat. Selected three-dimensional simulations have also been run to assess the validity of the 2D axisymmetric approximation. As a composite, these simulations represent the current state of understanding of NIF high foot implosion performance using the best and most detailed computational model available. While the most detailed simulations show approximate agreement with the experimental data, it is evident that the model remains incomplete and further refinements are needed. Nevertheless, avenues for improved performance are clearly indicated.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1437706
- Alternate Identifier(s):
- OSTI ID: 1438752
- Report Number(s):
- LLNL-JRNL-705905
Journal ID: ISSN 0741-3335
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Published Article
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Name: Plasma Physics and Controlled Fusion Journal Volume: 59 Journal Issue: 5; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION; inertial confinement fusion; National Ignition Facility; radiation hydrodynamics
Citation Formats
Clark, D. S., Kritcher, A. L., Milovich, J. L., Salmonson, J. D., Weber, C. R., Haan, S. W., Hammel, B. A., Hinkel, D. E., Marinak, M. M., Patel, M. V., and Sepke, S. M. Capsule modeling of high foot implosion experiments on the National Ignition Facility. United Kingdom: N. p., 2017.
Web. doi:10.1088/1361-6587/aa6216.
Clark, D. S., Kritcher, A. L., Milovich, J. L., Salmonson, J. D., Weber, C. R., Haan, S. W., Hammel, B. A., Hinkel, D. E., Marinak, M. M., Patel, M. V., & Sepke, S. M. Capsule modeling of high foot implosion experiments on the National Ignition Facility. United Kingdom. https://doi.org/10.1088/1361-6587/aa6216
Clark, D. S., Kritcher, A. L., Milovich, J. L., Salmonson, J. D., Weber, C. R., Haan, S. W., Hammel, B. A., Hinkel, D. E., Marinak, M. M., Patel, M. V., and Sepke, S. M. Tue .
"Capsule modeling of high foot implosion experiments on the National Ignition Facility". United Kingdom. https://doi.org/10.1088/1361-6587/aa6216.
@article{osti_1437706,
title = {Capsule modeling of high foot implosion experiments on the National Ignition Facility},
author = {Clark, D. S. and Kritcher, A. L. and Milovich, J. L. and Salmonson, J. D. and Weber, C. R. and Haan, S. W. and Hammel, B. A. and Hinkel, D. E. and Marinak, M. M. and Patel, M. V. and Sepke, S. M.},
abstractNote = {This study summarizes the results of detailed, capsule-only simulations of a set of high foot implosion experiments conducted on the National Ignition Facility (NIF). These experiments span a range of ablator thicknesses, laser powers, and laser energies, and modeling these experiments as a set is important to assess whether the simulation model can reproduce the trends seen experimentally as the implosion parameters were varied. Two-dimensional (2D) simulations have been run including a number of effects—both nominal and off-nominal—such as hohlraum radiation asymmetries, surface roughness, the capsule support tent, and hot electron pre-heat. Selected three-dimensional simulations have also been run to assess the validity of the 2D axisymmetric approximation. As a composite, these simulations represent the current state of understanding of NIF high foot implosion performance using the best and most detailed computational model available. While the most detailed simulations show approximate agreement with the experimental data, it is evident that the model remains incomplete and further refinements are needed. Nevertheless, avenues for improved performance are clearly indicated.},
doi = {10.1088/1361-6587/aa6216},
journal = {Plasma Physics and Controlled Fusion},
number = 5,
volume = 59,
place = {United Kingdom},
year = {Tue Mar 21 00:00:00 EDT 2017},
month = {Tue Mar 21 00:00:00 EDT 2017}
}
https://doi.org/10.1088/1361-6587/aa6216
Web of Science
Figures / Tables:
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Figures / Tables found in this record: