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Title: Radiochemical determination of Inertial Confinement Fusion capsule compression at the National Ignition Facility

We describe a radiochemical measurement of the ratio of isotope concentrations produced in a gold hohlraum surrounding an Inertial Confinement Fusion capsule at the National Ignition Facility (NIF). We relate the ratio of the concentrations of (n,γ) and (n,2n) products in the gold hohlraum matrix to the down-scatter of neutrons in the compressed fuel and, consequently, to the fuel's areal density. The observed ratio of the concentrations of {sup 198m+g}Au and {sup 196g}Au is a performance signature of ablator areal density and the fuel assembly confinement time. We identify the measurement of nuclear cross sections of astrophysical importance as a potential application of the neutrons generated at the NIF.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [1] ;  [2]
  1. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22308809
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CONCENTRATION RATIO; CONFINEMENT TIME; CROSS SECTIONS; FUEL ASSEMBLIES; GOLD; INERTIAL CONFINEMENT; NEUTRON REACTIONS; NEUTRONS; RADIOCHEMICAL ANALYSIS; US NATIONAL IGNITION FACILITY