Effects of asymmetry and hot-spot shape on ignition capsules
Abstract
Asymmetric implosion of inertial confinement fusion capsules is known, both experimentally and computationally, to reduce thermonuclear performance. This work shows that low-mode asymmetries degrade performance as a result of a decrease in the hydrodynamic disassembly time of the hot-spot core, which scales with the minimum dimension of the hot spot. The asymmetric shape of a hot spot results in decreased temperatures and areal densities and allows more alpha particles to escape, relative to an ideal spherical implosion, thus reducing alpha-energy deposition in the hot spot. Here, we extend previous ignition theory to include the hot-spot shape and quantify the effects of implosion asymmetry on both the ignition criterion and the capsule performance. The ignition criterion becomes more stringent with increasing deformation of the hot spot. The new theoretical results are validated by comparison with existing experimental data obtained at the National Ignition Facility. The shape effects on thermonuclear performance are relatively more noticeable for capsules having self-heating and high yields. As a result, the degradation of thermonuclear burn can be as high as 45% for shots with a yield lower than 2 × 1015 and less than 30% for shots with a higher yield.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1480029
- Alternate Identifier(s):
- OSTI ID: 1464320
- Report Number(s):
- LA-UR-18-23151
Journal ID: ISSN 2470-0045; PLEEE8
- Grant/Contract Number:
- AC52-06NA25396; W-7405-ENG-36
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 98; 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
Cheng, Baolian, Kwan, Thomas J. T., Yi, S. A., Landen, Otto L., Wang, Yi -Ming, Cerjan, Charlie J., Batha, Steven H., and Wysocki, Fred J. Effects of asymmetry and hot-spot shape on ignition capsules. United States: N. p., 2018.
Web. doi:10.1103/PhysRevE.98.023203.
Cheng, Baolian, Kwan, Thomas J. T., Yi, S. A., Landen, Otto L., Wang, Yi -Ming, Cerjan, Charlie J., Batha, Steven H., & Wysocki, Fred J. Effects of asymmetry and hot-spot shape on ignition capsules. United States. doi:https://doi.org/10.1103/PhysRevE.98.023203
Cheng, Baolian, Kwan, Thomas J. T., Yi, S. A., Landen, Otto L., Wang, Yi -Ming, Cerjan, Charlie J., Batha, Steven H., and Wysocki, Fred J. Mon .
"Effects of asymmetry and hot-spot shape on ignition capsules". United States. doi:https://doi.org/10.1103/PhysRevE.98.023203. https://www.osti.gov/servlets/purl/1480029.
@article{osti_1480029,
title = {Effects of asymmetry and hot-spot shape on ignition capsules},
author = {Cheng, Baolian and Kwan, Thomas J. T. and Yi, S. A. and Landen, Otto L. and Wang, Yi -Ming and Cerjan, Charlie J. and Batha, Steven H. and Wysocki, Fred J.},
abstractNote = {Asymmetric implosion of inertial confinement fusion capsules is known, both experimentally and computationally, to reduce thermonuclear performance. This work shows that low-mode asymmetries degrade performance as a result of a decrease in the hydrodynamic disassembly time of the hot-spot core, which scales with the minimum dimension of the hot spot. The asymmetric shape of a hot spot results in decreased temperatures and areal densities and allows more alpha particles to escape, relative to an ideal spherical implosion, thus reducing alpha-energy deposition in the hot spot. Here, we extend previous ignition theory to include the hot-spot shape and quantify the effects of implosion asymmetry on both the ignition criterion and the capsule performance. The ignition criterion becomes more stringent with increasing deformation of the hot spot. The new theoretical results are validated by comparison with existing experimental data obtained at the National Ignition Facility. The shape effects on thermonuclear performance are relatively more noticeable for capsules having self-heating and high yields. As a result, the degradation of thermonuclear burn can be as high as 45% for shots with a yield lower than 2 × 1015 and less than 30% for shots with a higher yield.},
doi = {10.1103/PhysRevE.98.023203},
journal = {Physical Review E},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {8}
}
Web of Science
Works referenced in this record:
Review of heavy-ion inertial fusion physics
journal, March 2016
- Kawata, S.; Karino, T.; Ogoyski, A. I.
- Matter and Radiation at Extremes, Vol. 1, Issue 2
Escape of α Particles from a Laser-Pulse-Initiated Thermonuclear Reaction
journal, April 1973
- Krokhin, Oleg N.; Rozanov, Vladislav B.
- Soviet Journal of Quantum Electronics, Vol. 2, Issue 4
Effects of preheat and mix on the fuel adiabat of an imploding capsule
journal, December 2016
- Cheng, B.; Kwan, T. J. T.; Wang, Y. M.
- Physics of Plasmas, Vol. 23, Issue 12
Zonal flow generation in inertial confinement fusion implosions
journal, March 2017
- Peterson, J. L.; Humbird, K. D.; Field, J. E.
- Physics of Plasmas, Vol. 24, Issue 3
Ignition condition and gain prediction for perturbed inertial confinement fusion targets
journal, November 2001
- Kishony, Roy; Shvarts, Dov
- Physics of Plasmas, Vol. 8, Issue 11
Analysis of NIF experiments with the minimal energy implosion model
journal, August 2015
- Cheng, B.; Kwan, T. J. T.; Wang, Y. M.
- Physics of Plasmas, Vol. 22, Issue 8
Results from neutron imaging of ICF experiments at NIF
journal, March 2016
- Merrill, F. E.; Danly, C. R.; Fittinghoff, D. N.
- Journal of Physics: Conference Series, Vol. 688
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
Effect of Nonuniform Implosion of Target on Fusion Parameters
journal, October 1984
- Kawata, Shigeo; Niu, Keishiro
- Journal of the Physical Society of Japan, Vol. 53, Issue 10
Detailed implosion modeling of deuterium-tritium layered experiments on the National Ignition Facility
journal, May 2013
- Clark, D. S.; Hinkel, D. E.; Eder, D. C.
- Physics of Plasmas, Vol. 20, Issue 5
Improving the hot-spot pressure and demonstrating ignition hydrodynamic equivalence in cryogenic deuterium–tritium implosions on OMEGA
journal, May 2014
- Goncharov, V. N.; Sangster, T. C.; Betti, R.
- Physics of Plasmas, Vol. 21, Issue 5
Influence of Nonuniform Laser Intensities on Ablatively Accelerated Targets
journal, January 1982
- Emery, Mark H.; Orens, Joseph H.; Gardner, John H.
- Physical Review Letters, Vol. 48, Issue 4
The physics of long- and intermediate-wavelength asymmetries of the hot spot: Compression hydrodynamics and energetics
journal, October 2017
- Bose, A.; Betti, R.; Shvarts, D.
- Physics of Plasmas, Vol. 24, Issue 10
Thermonuclear burn characteristics of compressed deuterium-tritium microspheres
journal, January 1974
- Fraley, G. S.
- Physics of Fluids, Vol. 17, Issue 2
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility
journal, May 2011
- Haan, S. W.; Lindl, J. D.; Callahan, D. A.
- Physics of Plasmas, Vol. 18, Issue 5
Thermonuclear reaction rates V
journal, November 1988
- Caughlan, Georgeanne R.; Fowler, William A.
- Atomic Data and Nuclear Data Tables, Vol. 40, Issue 2
Improved formulas for fusion cross-sections and thermal reactivities
journal, April 1992
- Bosch, H. -S; Hale, G. M.
- Nuclear Fusion, Vol. 32, Issue 4
Ignition and pusher adiabat
journal, June 2018
- Cheng, B.; Kwan, T. J. T.; Wang, Y. M.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 7
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
Three-dimensional simulations of low foot and high foot implosion experiments on the National Ignition Facility
journal, March 2016
- Clark, D. S.; Weber, C. R.; Milovich, J. L.
- Physics of Plasmas, Vol. 23, Issue 5
Scaling laws for ignition at the National Ignition Facility from first principles
journal, October 2013
- Cheng, Baolian; Kwan, Thomas J. T.; Wang, Yi-Ming
- Physical Review E, Vol. 88, Issue 4
On thermonuclear ignition criterion at the National Ignition Facility
journal, October 2014
- Cheng, Baolian; Kwan, Thomas J. T.; Wang, Yi-Ming
- Physics of Plasmas, Vol. 21, Issue 10
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
Impeding Hohlraum Plasma Stagnation in Inertial-Confinement Fusion
journal, January 2012
- Li, C. K.; Séguin, F. H.; Frenje, J. A.
- Physical Review Letters, Vol. 108, Issue 2
Three-dimensional modeling of direct-drive cryogenic implosions on OMEGA
journal, May 2016
- Igumenshchev, I. V.; Goncharov, V. N.; Marshall, F. J.
- Physics of Plasmas, Vol. 23, Issue 5
Signatures of asymmetry in neutron spectra and images predicted by three-dimensional radiation hydrodynamics simulations of indirect drive implosions
journal, May 2016
- Chittenden, J. P.; Appelbe, B. D.; Manke, F.
- Physics of Plasmas, Vol. 23, Issue 5
Works referencing / citing this record:
A theoretical model for low-mode asymmetries in ICF implosions
journal, February 2019
- Zhang, Cunbo; Yu, Chengxin; Yang, Chen
- Physics of Plasmas, Vol. 26, Issue 2
Analysis of NIF scaling using physics informed machine learning
journal, January 2020
- Hsu, Abigail; Cheng, Baolian; Bradley, Paul A.
- Physics of Plasmas, Vol. 27, Issue 1