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Title: Thermonuclear ignition and the onset of propagating burn in inertial fusion implosions

Abstract

Separating ignition of the central hot spot from propagating burn in the surrounding dense fuel is crucial to conclusively assess the achievement of ignition in inertial confinement fusion (ICF). We show that the transition from hot spot ignition to the onset of propagating burn occurs when the alpha heating within the hot spot has amplified the fusion yield by 15 to 25x with respect to the compression-only case without alpha energy deposition. This yield amplification corresponds to a value of the fractional alpha energy ƒα ≈ 1:4 (ƒα = 0.5 alpha energy/hot spot energy). The parameter fα can be inferred in ICF experiments by measuring the neutron yield, hot spot size, temperature, and burn width. This ignition threshold is measurable and applicable to all ICF implosions of DT-layered targets both direct and indirect drive. The results of this paper can be used to set the goals of the ICF effort with respect to the first demonstration of thermonuclear ignition.

Authors:
 [1];  [1];  [2]
  1. Univ. of Rochester, NY (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1498067
Alternate Identifier(s):
OSTI ID: 1496497
Report Number(s):
2018-220, 1469
Journal ID: ISSN 2470-0045; PLEEE8; 2018-220, 1469, 2428
Grant/Contract Number:  
NA0003856
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 99; Journal Issue: 2; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Christopherson, A. R., Betti, R., and Lindl, J. D. Thermonuclear ignition and the onset of propagating burn in inertial fusion implosions. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevE.99.021201.
Christopherson, A. R., Betti, R., & Lindl, J. D. Thermonuclear ignition and the onset of propagating burn in inertial fusion implosions. United States. https://doi.org/10.1103/PhysRevE.99.021201
Christopherson, A. R., Betti, R., and Lindl, J. D. Mon . "Thermonuclear ignition and the onset of propagating burn in inertial fusion implosions". United States. https://doi.org/10.1103/PhysRevE.99.021201. https://www.osti.gov/servlets/purl/1498067.
@article{osti_1498067,
title = {Thermonuclear ignition and the onset of propagating burn in inertial fusion implosions},
author = {Christopherson, A. R. and Betti, R. and Lindl, J. D.},
abstractNote = {Separating ignition of the central hot spot from propagating burn in the surrounding dense fuel is crucial to conclusively assess the achievement of ignition in inertial confinement fusion (ICF). We show that the transition from hot spot ignition to the onset of propagating burn occurs when the alpha heating within the hot spot has amplified the fusion yield by 15 to 25x with respect to the compression-only case without alpha energy deposition. This yield amplification corresponds to a value of the fractional alpha energy ƒα ≈ 1:4 (ƒα = 0.5 alpha energy/hot spot energy). The parameter fα can be inferred in ICF experiments by measuring the neutron yield, hot spot size, temperature, and burn width. This ignition threshold is measurable and applicable to all ICF implosions of DT-layered targets both direct and indirect drive. The results of this paper can be used to set the goals of the ICF effort with respect to the first demonstration of thermonuclear ignition.},
doi = {10.1103/PhysRevE.99.021201},
journal = {Physical Review E},
number = 2,
volume = 99,
place = {United States},
year = {2019},
month = {2}
}

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Works referenced in this record:

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

  • Edwards, M. J.; Patel, P. K.; Lindl, J. D.
  • Physics of Plasmas, Vol. 20, Issue 7
  • DOI: 10.1063/1.4816115

Thermonuclear ignition in inertial confinement fusion and comparison with magnetic confinement
journal, May 2010

  • Betti, R.; Chang, P. Y.; Spears, B. K.
  • Physics of Plasmas, Vol. 17, Issue 5
  • DOI: 10.1063/1.3380857

Review of the National Ignition Campaign 2009-2012
journal, February 2014

  • Lindl, John; Landen, Otto; Edwards, John
  • Physics of Plasmas, Vol. 21, Issue 2
  • DOI: 10.1063/1.4865400

Erratum: “Review of the National Ignition Campaign 2009-2012” [Phys. Plasmas 21, 020501 (2014)]
journal, December 2014

  • Lindl, J. D.; Landen, O. L.; Edwards, J.
  • Physics of Plasmas, Vol. 21, Issue 12
  • DOI: 10.1063/1.4903459

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


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

Effect of laser illumination nonuniformity on the analysis of time-resolved x-ray measurements in uv spherical transport experiments
journal, October 1987


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


Theory of alpha heating in inertial fusion: Alpha-heating metrics and the onset of the burning-plasma regime
journal, July 2018

  • Christopherson, A. R.; Betti, R.; Howard, J.
  • Physics of Plasmas, Vol. 25, Issue 7
  • DOI: 10.1063/1.5030337

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA
journal, May 2005

  • Radha, P. B.; Collins, T. J. B.; Delettrez, J. A.
  • Physics of Plasmas, Vol. 12, Issue 5
  • DOI: 10.1063/1.1882333

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

  • Lindl, J. D.; Haan, S. W.; Landen, O. L.
  • Physics of Plasmas, Vol. 25, Issue 12
  • DOI: 10.1063/1.5049595

A generalized scaling law for the ignition energy of inertial confinement fusion capsules
journal, January 2001


A comprehensive alpha-heating model for inertial confinement fusion
journal, January 2018

  • Christopherson, A. R.; Betti, R.; Bose, A.
  • Physics of Plasmas, Vol. 25, Issue 1
  • DOI: 10.1063/1.4991405

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


Magnetic-confinement fusion
journal, May 2016

  • Ongena, J.; Koch, R.; Wolf, R.
  • Nature Physics, Vol. 12, Issue 5
  • DOI: 10.1038/nphys3745

Fusion Energy Output Greater than the Kinetic Energy of an Imploding Shell at the National Ignition Facility
journal, June 2018


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 Physics of Inertial Fusion
book, January 2004


Generalized Measurable Ignition Criterion for Inertial Confinement Fusion
journal, April 2010


Some Criteria for a Power Producing Thermonuclear Reactor
journal, January 1957


Laser Compression of Matter to Super-High Densities: Thermonuclear (CTR) Applications
journal, September 1972

  • Nuckolls, John; Wood, Lowell; Thiessen, Albert
  • Nature, Vol. 239, Issue 5368, p. 139-142
  • DOI: 10.1038/239139a0

A measurable Lawson criterion and hydro-equivalent curves for inertial confinement fusion
journal, October 2008

  • Zhou, C. D.; Betti, R.
  • Physics of Plasmas, Vol. 15, Issue 10
  • DOI: 10.1063/1.2998604

Alpha Heating and Burning Plasmas in Inertial Confinement Fusion
journal, June 2015


    Works referencing / citing this record:

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

    • Zylstra, A. B.; Hurricane, O. A.
    • Physics of Plasmas, Vol. 26, Issue 6
    • DOI: 10.1063/1.5101074