Ignition Failure Mode Radiochemical Diagnostics Initial Assessment

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Radiochemical diagnostic signatures are well known to be effective indicators of nuclear ignition and burn reaction conditions. Nuclear activation is already a reliable technique to measure yield. More comprehensively, though, important quantities such as fuel areal density and ion temperature might be separately and more precisely monitored by a judicious choice of select nuclear reactions. This report details an initial assessment of this approach to diagnosing ignition failures on point-design cryogenic National Ignition Campaign targets. Using newly generated nuclear reaction cross section data for Scandium and Iridium, modest uniform doping of the innermost ablator region provides clearly observable reaction product ... continued below

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Fortner, R; Bernstein, L; Cerjan, C; Haan, S W; Harding, R; Hatchett, S et al. April 20, 2007.

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Radiochemical diagnostic signatures are well known to be effective indicators of nuclear ignition and burn reaction conditions. Nuclear activation is already a reliable technique to measure yield. More comprehensively, though, important quantities such as fuel areal density and ion temperature might be separately and more precisely monitored by a judicious choice of select nuclear reactions. This report details an initial assessment of this approach to diagnosing ignition failures on point-design cryogenic National Ignition Campaign targets. Using newly generated nuclear reaction cross section data for Scandium and Iridium, modest uniform doping of the innermost ablator region provides clearly observable reaction product differences between robust burn and failure for either element. Both equatorial and polar tracer loading yield observable, but indistinguishable, signatures for either choice of element for the preliminary cases studied.

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PDF-file: 12 pages; size: 1.1 Mbytes

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  • Report No.: UCRL-TR-230178
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/908127 | External Link
  • Office of Scientific & Technical Information Report Number: 908127
  • Archival Resource Key: ark:/67531/metadc886649

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • April 20, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 1:54 p.m.

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Fortner, R; Bernstein, L; Cerjan, C; Haan, S W; Harding, R; Hatchett, S et al. Ignition Failure Mode Radiochemical Diagnostics Initial Assessment, report, April 20, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc886649/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.