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Proceedings Paper

Vast Area Detection for Experimental Radiochemistry (VADER) at the National Ignition Facility
Author(s): Justin Galbraith; Ron Bettencourt; Dawn Shaughnessy; Narek Gharibyan; Bahram Talison; Kevin Morris; Cal Smith
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Paper Abstract

At the National Ignition Facility (NIF), the flux of neutrons and charged particles at peak burn in an inertial confinement fusion capsule induces measureable concentrations of nuclear reaction products in the target material. Radiochemical analysis of post-shot debris can be used to determine diagnostic parameters associated with implosion of the capsule, including fuel areal density and ablator-fuel mixing. Additionally, analysis of debris from specially doped targets can support nuclear forensic research.

We have developed and are deploying the Vast Area Detection for Experimental Radiochemistry (VADER) diagnostic to collect shot debris and interact with post-shot reaction products at the NIF. VADER uses quick release collectors that are easily reconfigured for different materials and geometries. Collectors are located ~50 cm from the NIF target; each of up to 9 collectors views ~0.005-0.0125 steradians solid angle, dependent upon configuration.

Dynamic loading of the NIF target vaporized mass was modelled using LS-DYNA. 3-dimensional printing was utilized to expedite the design process. Model-based manufacturing was used throughout.

We will describe the design and operation of this diagnostic as well as some initial results.

Paper Details

Date Published: 31 August 2015
PDF: 10 pages
Proc. SPIE 9591, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV, 95910G (31 August 2015); doi: 10.1117/12.2189310
Show Author Affiliations
Justin Galbraith, Lawrence Livermore National Lab. (United States)
Ron Bettencourt, Lawrence Livermore National Lab. (United States)
Dawn Shaughnessy, Lawrence Livermore National Lab. (United States)
Narek Gharibyan, Lawrence Livermore National Lab. (United States)
Bahram Talison, Lawrence Livermore National Lab. (United States)
Kevin Morris, Lawrence Livermore National Lab. (United States)
Cal Smith, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 9591:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV
Jeffrey A. Koch; Gary P. Grim, Editor(s)

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