Streaked radiography of an irradiated foam sample on the National Ignition Facility

Journal Article · Fri Mar 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4793727· OSTI ID:22107715

Cooper, A. B. R.; Schneider, M. B.; MacLaren, S. A.; Young, P. E.; Hsing, W. W.; Seugling, R.; Foord, M. E.; Sain, J. D.; May, M. J.; Marrs, R. E.; Maddox, B. R.; Lu, K.; Dodson, K.; Smalyuk, V. ^[1]; Moore, A. S.; Graham, P.; Foster, J. M. ^[2]; Back, C. A.; Hund, J. F. ^[3]

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1. Lawrence Livermore National Laboratory, 7000 East Ave Livermore, California 94550 (United States)
2. Atomic Weapons Establishment, Aldermaston, Reading RG7 4PR (United Kingdom)
3. General Atomics, San Diego, California 92121 (United States)

Streaked x-ray radiography images of annular patterns in an evolving tantalum oxide foam under the influence of a driven, subsonic radiation wave were obtained on the National Ignition Facility. This is the first successful radiography measurement of the evolution of well-defined foam features under a driven, subsonic wave in the diffusive regime. A continuous record of the evolution was recorded on an x-ray streak camera, using a slot-apertured point-projection backlighter with an 8 ns nickel source (7.9 keV). Radiography images were obtained for four different annular patterns, which were corrected using a source-dependent flat-field image. The evolution of the foam features was well-modeled using the 3D KULL radiation hydrodynamics code. This experimental and modeling platform can be modified for scaled high-energy-density laboratory astrophysics experiments.

• OSTI ID: 22107715
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
FOAMS
HYDRODYNAMICS
IGNITION
IMAGES
IRRADIATION
KEV RANGE 01-10
NICKEL
PLASMA DIAGNOSTICS
PLASMA WAVES
SHOCK WAVES
STREAK CAMERAS
TANTALUM OXIDES
THREE-DIMENSIONAL CALCULATIONS
X RADIATION
X-RAY RADIOGRAPHY