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Title: Development of Compton radiography of inertial confinement fusion implosions

An important diagnostic tool for inertial confinement fusion will be time-resolved radiographic imaging of the dense cold fuel surrounding the hot spot. The measurement technique is based on point-projection radiography at photon energies from 60 to 200 keV where the Compton effect is the dominant contributor to the opacity of the fuel or pusher. We have successfully applied this novel Compton radiography technique to the study of the final compression of directly driven plastic capsules at the OMEGA facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. The radiographs have a spatial and temporal resolution of {approx}10 {mu}m and {approx}10 ps, respectively. A statistical accuracy of {approx}0.5% in transmission per resolution element is achieved, allowing localized measurements of areal mass densities to 7% accuracy. The experimental results show 3D nonuniformities and lower than 1D expected areal densities attributed to drive asymmetries and hydroinstabilities.
Authors:
; ; ; ; ; ; ; ;  [1] ; ; ; ;  [2]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  2. Laboratory of Laser Energetics, Rochester, New York 14623-1299 (United States)
Publication Date:
OSTI Identifier:
21537894
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 18; Journal Issue: 5; Other Information: DOI: 10.1063/1.3567499; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPTON EFFECT; IMAGES; INERTIAL CONFINEMENT; PLASMA DIAGNOSTICS; PLASMA INSTABILITY BASIC INTERACTIONS; CONFINEMENT; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; INSTABILITY; INTERACTIONS; PLASMA CONFINEMENT; SCATTERING