DEVELOPMENT OF SOLID COLLECTION DIAGNOSTICS ON NIF THROUGH BLAST SHIELD ANALYSIS

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Radiochemical analysis of post-shot debris inside the National Ignition Facility (NIF) target chamber can help determine various diagnostic parameters associated with the implosion efficiency of the fusion capsule. This capability is limited by the amount of target isotope that can be loaded inside the capsule ablator without affecting performance and the collection efficiency of the capsule debris after implosion. Prior to designing a collection system, the chemical nature and distribution of the debris inside the chamber must be determined and analysis methods developed. The focus of our current work has been on determining the elemental composition and distribution of debris ... continued below

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Gostic, J M; Shaughnessy, D A; Grant, P M; Hutcheon, I D; Lewis, L A & Moody, K J December 15, 2011.

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Radiochemical analysis of post-shot debris inside the National Ignition Facility (NIF) target chamber can help determine various diagnostic parameters associated with the implosion efficiency of the fusion capsule. This capability is limited by the amount of target isotope that can be loaded inside the capsule ablator without affecting performance and the collection efficiency of the capsule debris after implosion. Prior to designing a collection system, the chemical nature and distribution of the debris inside the chamber must be determined and analysis methods developed. The focus of our current work has been on determining the elemental composition and distribution of debris on various blast shields and witness plates that were exposed to the chamber during ignition shots that occurred in 2009. These passive collection plates were used to develop both non-destructive and chemical analysis techniques to determine debris composition and melt depth at various shot energy profiles. A summary of these data will be presented along with our current strategy for the 2011 campaign.

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PDF-file: 8 pages; size: 2.5 Mbytes

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  • Presented at: Nuclear Explosives Design Physics. Conference (NEDPC) at Los Alamos National Laboratory, Los Alamos, NM, United States, Oct 17 - Oct 21, 2011

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  • Report No.: LLNL-PROC-520621
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1034517
  • Archival Resource Key: ark:/67531/metadc837456

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  • December 15, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 23, 2016, 3:41 p.m.

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Gostic, J M; Shaughnessy, D A; Grant, P M; Hutcheon, I D; Lewis, L A & Moody, K J. DEVELOPMENT OF SOLID COLLECTION DIAGNOSTICS ON NIF THROUGH BLAST SHIELD ANALYSIS, article, December 15, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc837456/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.