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Synthetic nuclear diagnostics for inferring plasma properties of inertial confinement fusion implosions

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Title: Synthetic nuclear diagnostics for inferring plasma properties of inertial confinement fusion implosions
Authors: Crilly, AJ
Appelbe, BD
McGlinchey, K
Walsh, CA
Tong, JK
Boxall, AB
Chittenden, JP
Item Type: Journal Article
Abstract: A suite of synthetic nuclear diagnostics has been developed to post-process radiation hydrodynamics simulations performed with the code Chimera. These provide experimental observables based on simulated capsule properties and are used to assess alternative experimental and data analysis techniques. These diagnostics include neutron spectroscopy, primary and scattered neutron imaging, neutron activation, γ-ray time histories and carbon γ-ray imaging. Novel features of the neutron spectrum have been analysed to infer plasma parameters. The nT and nD backscatter edges have been shown to provide a shell velocity measurement. Areal density asymmetries created by low mode perturbations have been inferred from the slope of the downscatter spectrum down to 10 MeV. Neutron activation diagnostics showed significant aliasing of high mode areal density asymmetries when observing a capsule implosion with 3D multimode perturbations applied. Carbon γ-ray imaging could be used to image the ablator at a high convergence ratio. Time histories of both the fusion and carbon γ signals showed a greater time difference between peak intensities for the perturbed case when compared to a symmetric simulation.
Issue Date: 1-Dec-2018
Date of Acceptance: 23-Nov-2018
URI: http://hdl.handle.net/10044/1/71386
DOI: https://dx.doi.org/10.1063/1.5027462
ISSN: 1070-664X
Publisher: AIP Publishing
Journal / Book Title: Physics of Plasmas
Volume: 25
Issue: 12
Copyright Statement: © 2018 The Author(s). Published by AIPPublishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas and may be found at https://aip.scitation.org/doi/10.1063/1.5027462
Sponsor/Funder: Lawrence Livermore National Laboratory
AWE Plc
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: B618573
300115146/1
EP/M01102X/1
EP/P010288/1
Keywords: Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
NEUTRON SCATTERING
DATA LIBRARY
IGNITION
SPECTRA
KERNEL
QEOS
physics.plasm-ph
physics.plasm-ph
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
NEUTRON SCATTERING
DATA LIBRARY
IGNITION
SPECTRA
KERNEL
QEOS
Fluids & Plasmas
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0201 Astronomical and Space Sciences
0203 Classical Physics
Publication Status: Published
Article Number: ARTN 122703
Online Publication Date: 2018-12-13
Appears in Collections:Physics
Plasma Physics
Faculty of Natural Sciences