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Title: Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility

Abstract

In order to achieve the several hundred Gbar stagnation pressures necessary for inertial confinement fusion ignition, implosion experiments on the National Ignition Facility (NIF) [E. I. Moses et al., Phys. Plasmas 16, 041006 (2009)] require the compression of deuterium-tritium fuel layers by a convergence ratio as high as forty. Such high convergence implosions are subject to degradation by a range of perturbations, including the growth of small-scale defects due to hydrodynamic instabilities, as well as longer scale modulations due to radiation flux asymmetries in the enclosing hohlraum. Due to the broad range of scales involved, and also the genuinely three-dimensional (3D) character of the flow, accurately modeling NIF implosions remains at the edge of current simulation capabilities. This paper describes the current state of progress of 3D capsule-only simulations of NIF implosions aimed at accurately describing the performance of specific NIF experiments. Current simulations include the effects of hohlraum radiation asymmetries, capsule surface defects, the capsule support tent and fill tube, and use a grid resolution shown to be converged in companion two-dimensional simulations. The results of detailed simulations of low foot implosions from the National Ignition Campaign are contrasted against results for more recent high foot implosions. While themore » simulations suggest that low foot performance was dominated by ablation front instability growth, especially the defect seeded by the capsule support tent, high foot implosions appear to be dominated by hohlraum flux asymmetries, although the support tent still plays a significant role. For both implosion types, the simulations show reasonable, though not perfect, agreement with the data and suggest that a reliable predictive capability is developing to guide future implosions toward ignition.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
22600241
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 5; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; ASYMMETRY; CAPSULES; COMPUTERIZED SIMULATION; CONVERGENCE; DEUTERIUM; IMPLOSIONS; INERTIAL CONFINEMENT; PERTURBATION THEORY; PLASMA; RADIATION FLUX; SILICON OXIDES; THERMONUCLEAR IGNITION; THREE-DIMENSIONAL CALCULATIONS; TRITIUM; TWO-DIMENSIONAL CALCULATIONS; US NATIONAL IGNITION FACILITY

Citation Formats

Clark, D. S., Weber, C. R., Milovich, J. L., Salmonson, J. D., Kritcher, A. L., Haan, S. W., Hammel, B. A., Hinkel, D. E., Hurricane, O. A., Jones, O. S., Marinak, M. M., Patel, P. K., Robey, H. F., Sepke, S. M., and Edwards, M. J. Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility. United States: N. p., 2016. Web. doi:10.1063/1.4943527.
Clark, D. S., Weber, C. R., Milovich, J. L., Salmonson, J. D., Kritcher, A. L., Haan, S. W., Hammel, B. A., Hinkel, D. E., Hurricane, O. A., Jones, O. S., Marinak, M. M., Patel, P. K., Robey, H. F., Sepke, S. M., & Edwards, M. J. Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility. United States. https://doi.org/10.1063/1.4943527
Clark, D. S., Weber, C. R., Milovich, J. L., Salmonson, J. D., Kritcher, A. L., Haan, S. W., Hammel, B. A., Hinkel, D. E., Hurricane, O. A., Jones, O. S., Marinak, M. M., Patel, P. K., Robey, H. F., Sepke, S. M., and Edwards, M. J. 2016. "Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility". United States. https://doi.org/10.1063/1.4943527.
@article{osti_22600241,
title = {Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility},
author = {Clark, D. S. and Weber, C. R. and Milovich, J. L. and Salmonson, J. D. and Kritcher, A. L. and Haan, S. W. and Hammel, B. A. and Hinkel, D. E. and Hurricane, O. A. and Jones, O. S. and Marinak, M. M. and Patel, P. K. and Robey, H. F. and Sepke, S. M. and Edwards, M. J.},
abstractNote = {In order to achieve the several hundred Gbar stagnation pressures necessary for inertial confinement fusion ignition, implosion experiments on the National Ignition Facility (NIF) [E. I. Moses et al., Phys. Plasmas 16, 041006 (2009)] require the compression of deuterium-tritium fuel layers by a convergence ratio as high as forty. Such high convergence implosions are subject to degradation by a range of perturbations, including the growth of small-scale defects due to hydrodynamic instabilities, as well as longer scale modulations due to radiation flux asymmetries in the enclosing hohlraum. Due to the broad range of scales involved, and also the genuinely three-dimensional (3D) character of the flow, accurately modeling NIF implosions remains at the edge of current simulation capabilities. This paper describes the current state of progress of 3D capsule-only simulations of NIF implosions aimed at accurately describing the performance of specific NIF experiments. Current simulations include the effects of hohlraum radiation asymmetries, capsule surface defects, the capsule support tent and fill tube, and use a grid resolution shown to be converged in companion two-dimensional simulations. The results of detailed simulations of low foot implosions from the National Ignition Campaign are contrasted against results for more recent high foot implosions. While the simulations suggest that low foot performance was dominated by ablation front instability growth, especially the defect seeded by the capsule support tent, high foot implosions appear to be dominated by hohlraum flux asymmetries, although the support tent still plays a significant role. For both implosion types, the simulations show reasonable, though not perfect, agreement with the data and suggest that a reliable predictive capability is developing to guide future implosions toward ignition.},
doi = {10.1063/1.4943527},
url = {https://www.osti.gov/biblio/22600241}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 23,
place = {United States},
year = {2016},
month = {5}
}

Works referenced in this record:

Taylor instability in shock acceleration of compressible fluids
journal, May 1960


Instability of the interface of two gases accelerated by a shock wave
journal, January 1972


High-mode Rayleigh-Taylor growth in NIF ignition capsules
journal, June 2010


Three-dimensional HYDRA simulations of National Ignition Facility targets
journal, May 2001


Symmetry tuning for ignition capsules via the symcap technique
journal, May 2011


Short-wavelength and three-dimensional instability evolution in National Ignition Facility ignition capsule designs
journal, August 2011


Cryogenic thermonuclear fuel implosions on the National Ignition Facility
journal, May 2012


Neutron spectrometry—An essential tool for diagnosing implosions at the National Ignition Facility (invited)
journal, October 2012


Implosion dynamics measurements at the National Ignition Facility
journal, December 2012


Nuclear imaging of the fuel assembly in ignition experiments
journal, May 2013


Progress towards ignition on the National Ignition Facility
journal, July 2013


Hydrodynamic instability growth and mix experiments at the National Ignition Facility
journal, May 2014


The high-foot implosion campaign on the National Ignition Facility
journal, May 2014


A survey of pulse shape options for a revised plastic ablator ignition design
journal, November 2014


Effect of the mounting membrane on shape in inertial confinement fusion implosions
journal, February 2015


Three-dimensional hydrodynamics of the deceleration stage in inertial confinement fusion
journal, March 2015


Tent-induced perturbations on areal density of implosions at the National Ignition Facilitya)
journal, May 2015


Stabilization of high-compression, indirect-drive inertial confinement fusion implosions using a 4-shock adiabat-shaped drive
journal, August 2015


First beryllium capsule implosions on the National Ignition Facility
journal, May 2016


XLVI. Hydrokinetic solutions and observations
journal, November 1871


Radiation transport between two concentric spheres
journal, December 2000


The Physics of Inertial Fusion
book, January 2004


Inhibition of turbulence in inertial-confinement-fusion hot spots by viscous dissipation
journal, May 2014


Reduced instability growth with high-adiabat high-foot implosions at the National Ignition Facility
journal, July 2014


Direct Measurement of Energetic Electrons Coupling to an Imploding Low-Adiabat Inertial Confinement Fusion Capsule
journal, March 2012


Hot-Spot Mix in Ignition-Scale Inertial Confinement Fusion Targets
journal, July 2013


Onset of Hydrodynamic Mix in High-Velocity, Highly Compressed Inertial Confinement Fusion Implosions
journal, August 2013


Design of a High-Foot High-Adiabat ICF Capsule for the National Ignition Facility
journal, February 2014


Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility
journal, March 2014


2D X-Ray Radiography of Imploding Capsules at the National Ignition Facility
journal, May 2014


Characterization of Isolated Defects for NIF Targets Using PSDI with an Analysis of Shell Flipping Capability
journal, May 2009


Dynamic symmetry of indirectly driven inertial confinement fusion capsules on the National Ignition Facility
journal, May 2014


Higher velocity, high-foot implosions on the National Ignition Facility lasera)
journal, May 2015


Works referencing / citing this record:

Inertial-confinement fusion with lasers
journal, May 2016


Observation of persistent species temperature separation in inertial confinement fusion mixtures
journal, January 2020


Impact of the Langdon effect on crossed-beam energy transfer
journal, December 2019


First beryllium capsule implosions on the National Ignition Facility
journal, May 2016


Integrated modeling of cryogenic layered highfoot experiments at the NIF
journal, May 2016


Improving ICF implosion performance with alternative capsule supports
journal, May 2017


High-resolution modeling of indirectly driven high-convergence layered inertial confinement fusion capsule implosions
journal, May 2017


The role of hot spot mix in the low-foot and high-foot implosions on the NIF
journal, May 2017


The effects of convergence ratio on the implosion behavior of DT layered inertial confinement fusion capsules
journal, July 2017


Experimental validation of thermodynamic mixture rules at extreme pressures and densities
journal, January 2018


Variable convergence liquid layer implosions on the National Ignition Facility
journal, May 2018


High-pressure chemistry of hydrocarbons relevant to planetary interiors and inertial confinement fusion
journal, May 2018


A near one-dimensional indirectly driven implosion at convergence ratio 30
journal, May 2018


Late-time mixing and turbulent behavior in high-energy-density shear experiments at high Atwood numbers
journal, May 2018


A “polar contact” tent for reduced perturbation and improved performance of NIF ignition capsules
journal, August 2018


Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes
journal, August 2018


Instability growth seeded by DT density perturbations in ICF capsules
journal, September 2018


Octahedral spherical Hohlraum for Rev. 6 NIF beryllium capsule
journal, October 2018


Design considerations for indirectly driven double shell capsules
journal, September 2018


Probing the seeding of hydrodynamic instabilities from nonuniformities in ablator materials using 2D velocimetry
journal, September 2018


Progress toward a self-consistent set of 1D ignition capsule metrics in ICF
journal, December 2018


Diagnostic signatures of performance degrading perturbations in inertial confinement fusion implosions
journal, December 2018


Robustness to hydrodynamic instabilities in indirectly driven layered capsule implosions
journal, January 2019


A theoretical model for low-mode asymmetries in ICF implosions
journal, February 2019


Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code
journal, April 2019


Perturbation modifications by pre-magnetisation of inertial confinement fusion implosions
journal, February 2019


Three-dimensional modeling and hydrodynamic scaling of National Ignition Facility implosions
journal, May 2019


First experiments on Revolver shell collisions at the OMEGA laser
journal, July 2019


On alpha-particle transport in inertial fusion
journal, June 2019


Announcement: The 2018 Ronald C. Davidson Award for Plasma Physics
journal, May 2019


Turbulent transport and mixing in the multimode narrowband Richtmyer-Meshkov instability
journal, September 2019


Mixing in ICF implosions on the National Ignition Facility caused by the fill-tube
journal, March 2020


Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility
journal, June 2018


Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research
journal, February 2018


Beyond alpha-heating: driving inertially confined fusion implosions toward a burning-plasma state on the National Ignition Facility
journal, November 2018


Yield reduction via the Knudsen layer effect in a mixture of fuel and pusher material
journal, December 2018


Compression and burning of a direct-driven thermonuclear target under the conditions of inhomogeneous heating by a multi-beam megajoule laser
journal, January 2019


Modeling and projecting implosion performance for the National Ignition Facility
journal, December 2018


Progress of indirect drive inertial confinement fusion in the United States
journal, July 2019


Kinetic simulations of fusion ignition with hot-spot ablator mix
journal, September 2019


Effects of asymmetry and hot-spot shape on ignition capsules
journal, August 2018


Hydrodynamic instability seeding by oxygen nonuniformities in glow discharge polymer inertial fusion ablators
journal, September 2018


Energy transfer between lasers in low-gas-fill-density hohlraums
journal, November 2018


Development of Improved Radiation Drive Environment for High Foot Implosions at the National Ignition Facility
journal, November 2016


First Liquid Layer Inertial Confinement Fusion Implosions at the National Ignition Facility
journal, December 2016


High-Performance Indirect-Drive Cryogenic Implosions at High Adiabat on the National Ignition Facility
journal, September 2018


Thermal Temperature Measurements of Inertial Fusion Implosions
journal, August 2018


Energy penetration into arrays of aligned nanowires irradiated with relativistic intensities: Scaling to terabar pressures
journal, January 2017