A recoverable gas-cell diagnostic for the National Ignition Facility

The high-fluence neutron spectrum produced by the National Ignition Facility (NIF) provides an opportunity to measure the activation of materials by fast-spectrum neutrons. A new large-volume gas-cell diagnostic has been designed and qualified to measure the activation of gaseous substances at the N...

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Published inReview of scientific instruments Vol. 87; no. 11; p. 11D825
Main Authors Ratkiewicz, A, Berzak Hopkins, L, Bleuel, D L, Bernstein, L A, van Bibber, K, Cassata, W S, Goldblum, B L, Siem, S, Velsko, C A, Wiedeking, M, Yeamans, C B
Format Journal Article
LanguageEnglish
Published United States 01.11.2016
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Summary:The high-fluence neutron spectrum produced by the National Ignition Facility (NIF) provides an opportunity to measure the activation of materials by fast-spectrum neutrons. A new large-volume gas-cell diagnostic has been designed and qualified to measure the activation of gaseous substances at the NIF. This in-chamber diagnostic is recoverable, reusable and has been successfully fielded. Data from the qualification of the diagnostic have been used to benchmark an Monte Carlo N-Particle Transport Code simulation describing the downscattered neutron spectrum seen by the gas cell. We present early results from the use of this diagnostic to measure the activation of Xe and discuss future work to study the strength of interactions between plasma and nuclei.
ISSN:1089-7623
DOI:10.1063/1.4961278