A time-resolved x-ray ring coded-aperture microscope for inertial confinement fusion applications

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1144051· OSTI ID:6459632

Ress, D; Bell, P M ^[1]; Bradley, D K ^[2]

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1. Lawrence Livermore National Laboratory, P.O. Box 5508, Livermore, California 94551 (United States)
2. Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623 (United States)

For energetic x rays ([ital hv][ge]3 keV), ring coded-aperture imaging gives better signal-to-noise ratio than equivalent-resolution pinhole cameras for inertial confinement fusion (ICF) targets. We have created a time-resolved ring coded-aperture microscope by combining a 4[times]3 array of annular apertures with a gated microchannel-plate x-ray imager. The new instrument can produce 500-ps duration sequences of images with a temporal resolution of 80 ps and a spatial resolution of 5 to 6 [mu]m. In demonstration experiments, coded images of imploded targets directly driven by the Omega laser at the Laboratory for Laser Energetics showed the formation and dissolution of the target cores with improved detail. Contour plots of the images indicate that the laser illumination pattern is imprinted in the imploded core region. The gated ring-aperture microscope will be useful in detailed studies of ICF target hydrodynamics.

• DOE Contract Number: W-7405-ENG-48; FC03-92SF19460
• OSTI ID: 6459632
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 64:6; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
DESIGN
ELECTROMAGNETIC RADIATION
ICF DEVICES
IMPLOSIONS
IONIZING RADIATIONS
LASER IMPLOSIONS
LAWRENCE LIVERMORE LABORATORY
MICROSCOPES
NATIONAL ORGANIZATIONS
PERFORMANCE
PLASMA DIAGNOSTICS
RADIATIONS
RESOLUTION
SIGNAL-TO-NOISE RATIO
THERMONUCLEAR DEVICES
TIME RESOLUTION
TIMING PROPERTIES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
X RADIATION