skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Indications of flow near maximum compression in layered deuterium-tritium implosions at the National Ignition Facility

Abstract

Here, an accurate understanding of burn dynamics in implosions of cryogenically layered deuterium (D) and tritium (T) filled capsules, obtained partly through precision diagnosis of these experiments, is essential for assessing the impediments to achieving ignition at the National Ignition Facility. We present measurements of neutrons from such implosions. The apparent ion temperatures T ion are inferred from the variance of the primary neutron spectrum. Consistently higher DT than DD T ion are observed and the difference is seen to increase with increasing apparent DT T ion. The line-of-sight rms variations of both DD and DT T ion are small, ~150eV, indicating an isotropic source. The DD neutron yields are consistently high relative to the DT neutron yields given the observed T ion. Spatial and temporal variations of the DT temperature and density, DD-DT differential attenuation in the surrounding DT fuel, and fluid motion variations contribute to a DT Tion greater than the DD T ion, but are in a one-dimensional model insufficient to explain the data. We hypothesize that in a three-dimensional interpretation, these effects combined could explain the results.

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [1];  [2];  [3] more »;  [3];  [3];  [3];  [3];  [3];  [3];  [1];  [3];  [3];  [3] « less
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Univ. of Rochester, Rochester, NY (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1313547
Alternate Identifier(s):
OSTI ID: 1294718; OSTI ID: 1324684
Report Number(s):
LLNL-JRNL-682118
Journal ID: ISSN 2470-0045; PLEEE8
Grant/Contract Number:  
AC52-07NA27344; NA0001857; NA0002949
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 29 ENERGY PLANNING, POLICY AND ECONOMY; 70 PLASMA PHYSICS AND FUSION; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Gatu Johnson, M., Knauer, J. P., Cerjan, C. J., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., Kilkenny, J. D., Munro, D. H., Sayre, D. B., Spears, B. K., Bionta, R. M., Bond, E. J., Caggiano, J. A., Callahan, D., Casey, D. T., Doppner, T., Frenje, J. A., Glebov, V. Yu., Hurricane, O., Kritcher, A., LePape, S., Ma, T., Mackinnon, A., Meezan, N., Patel, P., Petrasso, R. D., Ralph, J. E., Springer, P. T., and Yeamans, C. B. Indications of flow near maximum compression in layered deuterium-tritium implosions at the National Ignition Facility. United States: N. p., 2016. Web. doi:10.1103/PhysRevE.94.021202.
Gatu Johnson, M., Knauer, J. P., Cerjan, C. J., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., Kilkenny, J. D., Munro, D. H., Sayre, D. B., Spears, B. K., Bionta, R. M., Bond, E. J., Caggiano, J. A., Callahan, D., Casey, D. T., Doppner, T., Frenje, J. A., Glebov, V. Yu., Hurricane, O., Kritcher, A., LePape, S., Ma, T., Mackinnon, A., Meezan, N., Patel, P., Petrasso, R. D., Ralph, J. E., Springer, P. T., & Yeamans, C. B. Indications of flow near maximum compression in layered deuterium-tritium implosions at the National Ignition Facility. United States. doi:10.1103/PhysRevE.94.021202.
Gatu Johnson, M., Knauer, J. P., Cerjan, C. J., Eckart, M. J., Grim, G. P., Hartouni, E. P., Hatarik, R., Kilkenny, J. D., Munro, D. H., Sayre, D. B., Spears, B. K., Bionta, R. M., Bond, E. J., Caggiano, J. A., Callahan, D., Casey, D. T., Doppner, T., Frenje, J. A., Glebov, V. Yu., Hurricane, O., Kritcher, A., LePape, S., Ma, T., Mackinnon, A., Meezan, N., Patel, P., Petrasso, R. D., Ralph, J. E., Springer, P. T., and Yeamans, C. B. Mon . "Indications of flow near maximum compression in layered deuterium-tritium implosions at the National Ignition Facility". United States. doi:10.1103/PhysRevE.94.021202. https://www.osti.gov/servlets/purl/1313547.
@article{osti_1313547,
title = {Indications of flow near maximum compression in layered deuterium-tritium implosions at the National Ignition Facility},
author = {Gatu Johnson, M. and Knauer, J. P. and Cerjan, C. J. and Eckart, M. J. and Grim, G. P. and Hartouni, E. P. and Hatarik, R. and Kilkenny, J. D. and Munro, D. H. and Sayre, D. B. and Spears, B. K. and Bionta, R. M. and Bond, E. J. and Caggiano, J. A. and Callahan, D. and Casey, D. T. and Doppner, T. and Frenje, J. A. and Glebov, V. Yu. and Hurricane, O. and Kritcher, A. and LePape, S. and Ma, T. and Mackinnon, A. and Meezan, N. and Patel, P. and Petrasso, R. D. and Ralph, J. E. and Springer, P. T. and Yeamans, C. B.},
abstractNote = {Here, an accurate understanding of burn dynamics in implosions of cryogenically layered deuterium (D) and tritium (T) filled capsules, obtained partly through precision diagnosis of these experiments, is essential for assessing the impediments to achieving ignition at the National Ignition Facility. We present measurements of neutrons from such implosions. The apparent ion temperatures Tion are inferred from the variance of the primary neutron spectrum. Consistently higher DT than DD Tion are observed and the difference is seen to increase with increasing apparent DT Tion. The line-of-sight rms variations of both DD and DT Tion are small, ~150eV, indicating an isotropic source. The DD neutron yields are consistently high relative to the DT neutron yields given the observed Tion. Spatial and temporal variations of the DT temperature and density, DD-DT differential attenuation in the surrounding DT fuel, and fluid motion variations contribute to a DT Tion greater than the DD Tion, but are in a one-dimensional model insufficient to explain the data. We hypothesize that in a three-dimensional interpretation, these effects combined could explain the results.},
doi = {10.1103/PhysRevE.94.021202},
journal = {Physical Review E},
number = 2,
volume = 94,
place = {United States},
year = {2016},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

First High-Convergence Cryogenic Implosion in a Near-Vacuum Hohlraum
journal, April 2015


Fuel gain exceeding unity in an inertially confined fusion implosion
journal, February 2014

  • Hurricane, O. A.; Callahan, D. A.; Casey, D. T.
  • Nature, Vol. 506, Issue 7488
  • DOI: 10.1038/nature13008

Interpreting inertial fusion neutron spectra
journal, February 2016


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

  • Johnson, M. Gatu; Frenje, J. A.; Casey, D. T.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4728095

Neutron spectra from inertial confinement fusion targets for measurement of fuel areal density and charged particle stopping powers
journal, September 1987

  • Cable, M. D.; Hatchett, S. P.
  • Journal of Applied Physics, Vol. 62, Issue 6
  • DOI: 10.1063/1.339850

D–3He proton spectra for diagnosing shell ρR and fuel Ti of imploded capsules at OMEGA
journal, June 2000

  • Li, C. K.; Hicks, D. G.; Séguin, F. H.
  • Physics of Plasmas, Vol. 7, Issue 6
  • DOI: 10.1063/1.874099

Relativistic calculation of fusion product spectra for thermonuclear plasmas
journal, November 1998


Integrated diagnostic analysis of inertial confinement fusion capsule performance
journal, May 2013

  • Cerjan, Charles; Springer, Paul T.; Sepke, Scott M.
  • Physics of Plasmas, Vol. 20, Issue 5
  • DOI: 10.1063/1.4802196

The production spectrum in fusion plasmas
journal, February 2011


Understanding the stagnation and burn of implosions on NIF
journal, March 2016


Metrics for long wavelength asymmetries in inertial confinement fusion implosions on the National Ignition Facility
journal, April 2014

  • Kritcher, A. L.; Town, R.; Bradley, D.
  • Physics of Plasmas, Vol. 21, Issue 4
  • DOI: 10.1063/1.4871718

The effect of turbulent kinetic energy on inferred ion temperature from neutron spectra
journal, July 2014


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


Species separation and modification of neutron diagnostics in inertial-confinement fusion
journal, September 2014


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

  • Kritcher, A. L.; Hinkel, D. E.; Callahan, D. A.
  • Physics of Plasmas, Vol. 23, Issue 5
  • DOI: 10.1063/1.4949351

Operations on the National Ignition Facility
journal, February 2016

  • Van Wonterghem, Bruno M.; Brereton, Sandra J.; Burr, Robert F.
  • Fusion Science and Technology, Vol. 69, Issue 1
  • DOI: 10.13182/FST15-118

Diagnosing implosion performance at the National Ignition Facility (NIF) by means of neutron spectrometry
journal, March 2013


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

  • Weber, C. R.; Clark, D. S.; Cook, A. W.
  • Physics of Plasmas, Vol. 22, Issue 3
  • DOI: 10.1063/1.4914157

Observation of a Reflected Shock in an Indirectly Driven Spherical Implosion at the National Ignition Facility
journal, June 2014


Multi-shot analysis of the gamma reaction history diagnostic
journal, October 2012

  • Sayre, D. B.; Bernstein, L. A.; Church, J. A.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4729492

A neutron spectrometer for precise measurements of DT neutrons from 10 to 18 MeV at OMEGA and the National Ignition Facility
journal, January 2001

  • Frenje, J. A.; Green, K. M.; Hicks, D. G.
  • Review of Scientific Instruments, Vol. 72, Issue 1
  • DOI: 10.1063/1.1323243

The neutron imaging diagnostic at NIF (invited)
journal, October 2012

  • Merrill, F. E.; Bower, D.; Buckles, R.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4739242

The National Ignition Facility neutron time-of-flight system and its initial performance (invited)
journal, October 2010

  • Glebov, V. Yu.; Sangster, T. C.; Stoeckl, C.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3492351

High-Adiabat High-Foot Inertial Confinement Fusion Implosion Experiments on the National Ignition Facility
journal, February 2014


A generalized energy exchange kernel for inelastic neutron scattering and thermonuclear reactions
journal, October 1971


Radiation hydrodynamics modeling of the highest compression inertial confinement fusion ignition experiment from the National Ignition Campaign
journal, February 2015

  • Clark, D. S.; Marinak, M. M.; Weber, C. R.
  • Physics of Plasmas, Vol. 22, Issue 2
  • DOI: 10.1063/1.4906897

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

  • Marinak, M. M.; Kerbel, G. D.; Gentile, N. A.
  • Physics of Plasmas, Vol. 8, Issue 5
  • DOI: 10.1063/1.1356740

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


Testing a new NIF neutron time-of-flight detector with a bibenzyl scintillator on OMEGA
journal, October 2012

  • Glebov, V. Yu.; Forrest, C.; Knauer, J. P.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4731001

Neutron activation diagnostics at the National Ignition Facility (invited)
journal, October 2012

  • Bleuel, D. L.; Yeamans, C. B.; Bernstein, L. A.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4733741

Evidence for Stratification of Deuterium-Tritium Fuel in Inertial Confinement Fusion Implosions
journal, February 2012


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

  • Hurricane, O. A.; Callahan, D. A.; Casey, D. T.
  • Physics of Plasmas, Vol. 21, Issue 5
  • DOI: 10.1063/1.4874330

Three-dimensional simulations of National Ignition Facility implosions: Insight into experimental observablesa)
journal, May 2015

  • Spears, Brian K.; Munro, David H.; Sepke, Scott
  • Physics of Plasmas, Vol. 22, Issue 5
  • DOI: 10.1063/1.4920957

Convergent ablator performance measurements
journal, October 2010

  • Hicks, D. G.; Spears, B. K.; Braun, D. G.
  • Physics of Plasmas, Vol. 17, Issue 10
  • DOI: 10.1063/1.3486536

Improved formulas for fusion cross-sections and thermal reactivities
journal, April 1992


Ion‐temperature measurement of indirectly driven implosions using a geometry‐compensated neutron time‐of‐flight detector
journal, January 1995

  • Murphy, T. J.; Lerche, R. A.; Bennett, C.
  • Review of Scientific Instruments, Vol. 66, Issue 1
  • DOI: 10.1063/1.1146211

Demonstration of High Performance in Layered Deuterium-Tritium Capsule Implosions in Uranium Hohlraums at the National Ignition Facility
journal, July 2015


Measurements of collective fuel velocities in deuterium-tritium exploding pusher and cryogenically layered deuterium-tritium implosions on the NIF
journal, April 2013

  • Gatu Johnson, M.; Casey, D. T.; Frenje, J. A.
  • Physics of Plasmas, Vol. 20, Issue 4
  • DOI: 10.1063/1.4802810

Knudsen Layer Reduction of Fusion Reactivity
journal, August 2012


Analysis of the neutron time-of-flight spectra from inertial confinement fusion experiments
journal, November 2015

  • Hatarik, R.; Sayre, D. B.; Caggiano, J. A.
  • Journal of Applied Physics, Vol. 118, Issue 18
  • DOI: 10.1063/1.4935455

Ion Thermal Decoupling and Species Separation in Shock-Driven Implosions
journal, January 2015


The National Ignition Facility Diagnostic Set at the Completion of the National Ignition Campaign, September 2012
journal, February 2016

  • Kilkenny, J. D.; Bell, P. M.; Bradley, D. K.
  • Fusion Science and Technology, Vol. 69, Issue 1
  • DOI: 10.13182/FST15-173

The magnetic recoil spectrometer for measurements of the absolute neutron spectrum at OMEGA and the NIF
journal, April 2013

  • Casey, D. T.; Frenje, J. A.; Gatu Johnson, M.
  • Review of Scientific Instruments, Vol. 84, Issue 4
  • DOI: 10.1063/1.4796042

Thin Shell, High Velocity Inertial Confinement Fusion Implosions on the National Ignition Facility
journal, April 2015


Reaktionsneutronen als Hilfsmittel der Plasmadiagnostik
journal, February 1967

  • Lehner, G.; Pohl, F.
  • Zeitschrift f�r Physik, Vol. 207, Issue 1
  • DOI: 10.1007/BF01326097

Improved Performance of High Areal Density Indirect Drive Implosions at the National Ignition Facility using a Four-Shock Adiabat Shaped Drive
journal, September 2015


Fusion neutron energies and spectra
journal, July 1973


Self-Similar Structure and Experimental Signatures of Suprathermal Ion Distribution in Inertial Confinement Fusion Implosions
journal, September 2015