Analysis of NIF experiments with the minimal energy implosion model

We apply a recently developed analytical model of implosion and thermonuclear burn to fusion capsule experiments performed at the National Ignition Facility that used low-foot and high-foot laser pulse formats. Our theoretical predictions are consistent with the experimental data. Our studies, toget...

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Veröffentlicht in:Physics of plasmas 2015-08, Vol.22 (8)
Hauptverfasser: Cheng, B., Kwan, T. J. T., Wang, Y. M., Merrill, F. E., Cerjan, C. J., Batha, S. H.
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container_issue 8
container_start_page
container_title Physics of plasmas
container_volume 22
creator Cheng, B.
Kwan, T. J. T.
Wang, Y. M.
Merrill, F. E.
Cerjan, C. J.
Batha, S. H.
description We apply a recently developed analytical model of implosion and thermonuclear burn to fusion capsule experiments performed at the National Ignition Facility that used low-foot and high-foot laser pulse formats. Our theoretical predictions are consistent with the experimental data. Our studies, together with neutron image analysis, reveal that the adiabats of the cold fuel in both low-foot and high-foot experiments are similar. That is, the cold deuterium-tritium shells in those experiments are all in a high adiabat state at the time of peak implosion velocity. The major difference between low-foot and high-foot capsule experiments is the growth of the shock-induced instabilities developed at the material interfaces which lead to fuel mixing with ablator material. Furthermore, we have compared the NIF capsules performance with the ignition criteria and analyzed the alpha particle heating in the NIF experiments. Our analysis shows that alpha heating was appreciable only in the high-foot experiments.
doi_str_mv 10.1063/1.4928093
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source AIP Journals Complete; Alma/SFX Local Collection
subjects 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Ablative materials
adiabatic theorem
Alpha particles
Alpha rays
computer modeling
data analysis
Deuterium
energy efficiency
experiment design
Experiments
Heating
Ignition
Image analysis
inertial confinement
Mathematical models
neutron imaging
neutron sources
neutrons
Nuclear fuels
Plasma physics
Richtmyer Meshkov instabilities
Tritium
title Analysis of NIF experiments with the minimal energy implosion model
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