NDLI: Image processing methods for characterizing cryogenic target quality during ice layer formation at the National Ignition Facility (NIF)

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Image processing methods for characterizing cryogenic target quality during ice layer formation at the National Ignition Facility (NIF)

Content Provider	Semantic Scholar
Author	Leach, Richard R. Field, John Everett Mascio-Kegelmeyer, Laura Kozioziemski, Bernie Lee, Tanza Mapoles, Evan Rhys Roberts, Randy S. Dylla-Spears, Rebecca J. Suratwala, Tayyab I.
Copyright Year	2013
Abstract	A challenging aspect of preparing cryogenic targets for National Ignition Facility (NIF) ignition experiments is growing a single crystal layer (~ 70 m thick) of solid frozen deuterium-tritium (DT) fuel on the inner surface of a spherical hollow plastic capsule 2 mm in diameter. For the most critical fusion experiments, the layer must be smooth, having uniform thickness, and largely free of isolated defects (e.g. grooves). A single target layer typically takes up to 18 hours to form. X-ray images on 3 orthogonal axes are used to monitor the growth of the crystal and evaluate the quality of the layer. While these methods provide a good indicator of target layer condition, new metrics are currently being developed to take advantage of other properties in the x-ray image, which may give earlier indications of target quality. These properties include symmetry of texture, seed formation, and eigenimage analysis. We describe the approach and associated image processing to evaluate and classify these metrics, whose goal is to improve overall layer production and better quantify the quality of the layer during its growth.
File Format	PDF HTM / HTML
DOI	10.1117/12.2009413
Volume Number	8602
Alternate Webpage(s)	https://casis.llnl.gov/content/pages/casis_2013/docs/poster/Leach1_CASIS_2013.pdf
Alternate Webpage(s)	https://doi.org/10.1117/12.2009413
Journal	Photonics West - Lasers and Applications in Science and Engineering
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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