Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/47996
Title: Comparison of genetic-algorithm and emissivity-ratio analyses of image data from OMEGA implosion cores
Authors: Nagayama, T.
Mancini, R. C.
Florido, R. 
Tommasini, R.
Koch, J. A.
Delettrez, J. A.
Regan, S. P.
Smalyuk, V. A.
Welser-Sherrill, L. A.
Golovkin, I. E.
UNESCO Clasification: 2207 Física atómica y nuclear
Keywords: x-ray imaging instruments
Issue Date: 2008
Journal: Review of Scientific Instruments 
Abstract: Detailed analysis of x-ray narrow-band images from argon-doped deuterium-filled inertial confinement fusion implosion experiments yields information about the temperature spatial structure in the core at the collapse of the implosion. We discuss the analysis of direct-drive implosion experiments at OMEGA, in which multiple narrow-band images were recorded with a multimonochromatic x-ray imaging instrument. The temperature spatial structure is investigated by using the sensitivity of the Lyβ/Heβ line emissivity ratio to the temperature. Three analysis methods that consider the argon Heβ and Lyβ image data are discussed and the results compared. The methods are based on a ratio of image intensities, ratio of Abel-inverted emissivities, and a search and reconstruction technique driven by a Pareto genetic algorithm.
URI: http://hdl.handle.net/10553/47996
ISSN: 0034-6748
DOI: 10.1063/1.2966370
Source: Review Of Scientific Instruments [ISSN 0034-6748], v. 79 (10)
Appears in Collections:Actas de congresos
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