Density determination of the thermonuclear fuel region in inertial confinement fusion implosions

Volegov, P. L.; Batha, S. H.; Geppert-Kleinrath, V.; Danly, C. R.; Merrill, F. E.; Wilde, C. H.; Wilson, D. C.; Casey, D. T.; Fittinghoff, D.; Appelbe, B.; Chittenden, J. P.; Crilly, A. J.; McGlinchey, K.

doi:10.1063/1.5123751

Title: Density determination of the thermonuclear fuel region in inertial confinement fusion implosions

Journal Article · Mon Feb 24 00:00:00 EST 2020 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5123751· OSTI ID:1659194

^[1];

^[1]; Danly, C. R. ^[1];

^[1]; Wilde, C. H. ^[1];

^[1]; Casey, D. T. ^[2];

^[2]; Appelbe, B. ^[3]; Chittenden, J. P. ^[3]; Crilly, A. J. ^[3]; McGlinchey, K. ^[3]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Imperial College, London (United Kingdom)

Understanding of the thermonuclear burn in an inertial confinement fusion implosion requires knowledge of the local deuterium–tritium (DT) fuel density. Neutron imaging of the core now provides this previously unavailable information. Two types of neutron images are required. The first is an image of the primary 14-MeV neutrons produced by the D +T fusion reaction. The second is an image of the 14-MeV neutrons that leave the implosion hot spot and are downscattered to lower energy by elastic and inelastic collisions in the fuel. These neutrons are measured by gating the detector to record the 6–12 MeV neutrons. Using the reconstructed primary image as a nonuniform source, a set of linear equations is derived that describes the contribution of each voxel of the DT fuel region to a pixel in the downscattered image. Using the measured intensity of the 14-MeV neutrons and downscattered images, the set of equations is solved for the density distribution in the fuel region. The method is validated against test problems and simulations of high-yield implosions. The calculated DT density distribution from one experiment is presented.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA). Office of Defense Programs (DP)

Grant/Contract Number:: 89233218CNA000001; AC52-07NA27344

OSTI ID:: 1659194

Alternate ID(s):: OSTI ID: 1830496

Report Number(s):: LA-UR-19-27144; LLNL-JRNL-825789; TRN: US2203402

Journal Information:: Journal of Applied Physics, Vol. 127, Issue 8; ISSN 0021-8979

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

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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References (26)

Self characterization of a coded aperture array for neutron source imaging Volegov, P. L.; Danly, C. R.; Fittinghoff, D. N. Review of Scientific Instruments, Vol. 85, Issue 12 https://doi.org/10.1063/1.4902978	journal	December 2014
ENDF/B-VIII.0: The 8 th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data Brown, D. A.; Chadwick, M. B.; Capote, R. Nuclear Data Sheets, Vol. 148 https://doi.org/10.1016/j.nds.2018.02.001	journal	February 2018
Development of Compton radiography of inertial confinement fusion implosions Tommasini, R.; Hatchett, S. P.; Hey, D. S. Physics of Plasmas, Vol. 18, Issue 5 https://doi.org/10.1063/1.3567499	journal	May 2011
Using multiple neutron time of flight detectors to determine the hot spot velocity Hatarik, R.; Nora, R. C.; Spears, B. K. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039372	journal	October 2018
Effects of preheat and mix on the fuel adiabat of an imploding capsule Cheng, B.; Kwan, T. J. T.; Wang, Y. M. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4971814	journal	December 2016
Development of a neutron imaging diagnostic for inertial confinement fusion experiments Morgan, G. L.; Berggren, R. R.; Bradley, P. A. Review of Scientific Instruments, Vol. 72, Issue 1 https://doi.org/10.1063/1.1329883	journal	January 2001
Synthetic nuclear diagnostics for inferring plasma properties of inertial confinement fusion implosions Crilly, A. J.; Appelbe, B. D.; McGlinchey, K. Physics of Plasmas, Vol. 25, Issue 12 https://doi.org/10.1063/1.5027462	journal	December 2018
Design of the polar neutron-imaging aperture for use at the National Ignition Facility Fatherley, V. E.; Barker, D. A.; Fittinghoff, D. N. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4960314	journal	August 2016
Analysis of NIF experiments with the minimal energy implosion model Cheng, B.; Kwan, T. J. T.; Wang, Y. M. Physics of Plasmas, Vol. 22, Issue 8 https://doi.org/10.1063/1.4928093	journal	August 2015
Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility Batha, S. H.; Volegov, P. L.; Fatherley, V. E. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038815	journal	October 2018
Fusion Energy Output Greater than the Kinetic Energy of an Imploding Shell at the National Ignition Facility Le Pape, S.; Berzak Hopkins, L. F.; Divol, L. Physical Review Letters, Vol. 120, Issue 24 https://doi.org/10.1103/PhysRevLett.120.245003	journal	June 2018
Consequences of Neutron-Proton Mass Difference in the Kinematics of Neutron-Proton Scattering Ghatak, Ajoy K. American Journal of Physics, Vol. 32, Issue 2 https://doi.org/10.1119/1.1970145	journal	February 1964
Thermonuclear burn characteristics of compressed deuterium-tritium microspheres Fraley, G. S. Physics of Fluids, Vol. 17, Issue 2 https://doi.org/10.1063/1.1694739	journal	January 1974
Impact of temperature-velocity distribution on fusion neutron peak shape Munro, D. H.; Field, J. E.; Hatarik, R. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4976857	journal	May 2017
Neutron source reconstruction from pinhole imaging at National Ignition Facility Volegov, P.; Danly, C. R.; Fittinghoff, D. N. Review of Scientific Instruments, Vol. 85, Issue 2 https://doi.org/10.1063/1.4865456	journal	February 2014
The effect of turbulent kinetic energy on inferred ion temperature from neutron spectra Murphy, T. J. Physics of Plasmas, Vol. 21, Issue 7 https://doi.org/10.1063/1.4885342	journal	July 2014
Development of the indirect‐drive approach to inertial confinement fusion and the target physics basis for ignition and gain Lindl, John Physics of Plasmas, Vol. 2, Issue 11 https://doi.org/10.1063/1.871025	journal	November 1995
The National Ignition Facility Neutron Imaging System Wilke, Mark D.; Batha, Steven H.; Bradley, Paul A. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2987984	journal	October 2008
Plastic fiber scintillator response to fast neutrons Danly, C. R.; Sjue, S.; Wilde, C. H. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4891160	journal	November 2014
The neutron imaging diagnostic at NIF (invited) Merrill, F. E.; Bower, D.; Buckles, R. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4739242	journal	October 2012
Scaling laws for ignition at the National Ignition Facility from first principles Cheng, Baolian; Kwan, Thomas J. T.; Wang, Yi-Ming Physical Review E, Vol. 88, Issue 4 https://doi.org/10.1103/PhysRevE.88.041101	journal	October 2013
On three-dimensional reconstruction of a neutron/x-ray source from very few two-dimensional projections Volegov, P. L.; Danly, C. R.; Merrill, F. E. Journal of Applied Physics, Vol. 118, Issue 20 https://doi.org/10.1063/1.4936319	journal	November 2015
Three-dimensional reconstruction of neutron, gamma-ray, and x-ray sources using spherical harmonic decomposition Volegov, P. L.; Danly, C. R.; Fittinghoff, D. Journal of Applied Physics, Vol. 122, Issue 17 https://doi.org/10.1063/1.4986652	journal	November 2017
The National Ignition Facility Diagnostic Set at the Completion of the National Ignition Campaign, September 2012 Kilkenny, J. D.; Bell, P. M.; Bradley, D. K. Fusion Science and Technology, Vol. 69, Issue 1 https://doi.org/10.13182/FST15-173	journal	February 2016
Signatures of asymmetry in neutron spectra and images predicted by three-dimensional radiation hydrodynamics simulations of indirect drive implosions Chittenden, J. P.; Appelbe, B. D.; Manke, F. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4949523	journal	May 2016
Fusion neutron energies and spectra Brysk, H. Plasma Physics, Vol. 15, Issue 7 https://doi.org/10.1088/0032-1028/15/7/001	journal	July 1973

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