Self-Similar Structure and Experimental Signatures of Suprathermal Ion Distribution in Inertial Confinement Fusion Implosions
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PhysRevLett.115.105002.pdf
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Author(s)
Kagan, Grigory Alexandrovich
Svyatskiy, D.
Huang, C.-K.
McDevitt, C. J.
Rinderknecht, Hans G.
Rosenberg, Michael Jonathan
Zylstra, Alex Bennett
Date Issued
September 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Kagan, Grigory, D. Svyatskiy, H. G. Rinderknecht, M. J. Rosenberg, A. B. Zylstra, C.-K. Huang, and C. J. McDevitt. “Self-Similar Structure and Experimental Signatures of Suprathermal Ion Distribution in Inertial Confinement Fusion Implosions.” Physical Review Letters 115, no. 10 (September 2015). © 2015 American Physical Society
Version
Final published version
Abstract
The distribution function of suprathermal ions is found to be self-similar under conditions relevant to inertial confinement fusion hot spots. By utilizing this feature, interference between the hydrodynamic instabilities and kinetic effects is for the first time assessed quantitatively to find that the instabilities substantially aggravate the fusion reactivity reduction. The ion tail depletion is also shown to lower the experimentally inferred ion temperature, a novel kinetic effect that may explain the discrepancy between the exploding pusher experiments and rad-hydro simulations and contribute to the observation that temperature inferred from DD reaction products is lower than from DT at the National Ignition Facility.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.105002
