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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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