Analysis of NIF experiments with the minimal energy implosion model

Cheng, B.; Kwan, T. J.  T.; Wang, Y. M.; Merrill, F. E.; Cerjan, C. J.; Batha, S. H.

doi:10.1063/1.4928093

Title: Analysis of NIF experiments with the minimal energy implosion model

Journal Article · Fri Aug 07 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4928093· OSTI ID:1459807

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Here, 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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396; W-7405-ENG-36

OSTI ID:: 1459807

Alternate ID(s):: OSTI ID: 1229603

Report Number(s):: LA-UR-15-23802; PHPAEN; TRN: US1901802

Journal Information:: Physics of Plasmas, Vol. 22, Issue 8; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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Cited By (5)

Effects of preheat and mix on the fuel adiabat of an imploding capsule Cheng, B.; Kwan, T. J. T.; Wang, Y. M. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4971814	journal	December 2016
Direct measurement of the inertial confinement time in a magnetically driven implosion Knapp, P. F.; Martin, M. R.; Dolan, D. H. Physics of Plasmas, Vol. 24, Issue 4 https://doi.org/10.1063/1.4981206	journal	April 2017
Optimizing neutron imaging line of sight locations for maximizing sampling of the cold fuel density in inertial confinement fusion implosions at the National Ignition Facility Batha, S. H.; Volegov, P. L.; Fatherley, V. E. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038815	journal	October 2018
Analysis of NIF scaling using physics informed machine learning Hsu, Abigail; Cheng, Baolian; Bradley, Paul A. Physics of Plasmas, Vol. 27, Issue 1 https://doi.org/10.1063/1.5130585	journal	January 2020
Ignition and pusher adiabat Cheng, B.; Kwan, T. J. T.; Wang, Y. M. Plasma Physics and Controlled Fusion, Vol. 60, Issue 7 https://doi.org/10.1088/1361-6587/aac611	journal	June 2018

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