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Increased preheat energy to MagLIF targets with cryogenic cooling

Harvey-Thompson, Adam J.; Geissel, Matthias; Crabtree, Jerry A.; Weis, Matthew R.; Gomez, Matthew R.; Fein, Jeffrey R.; Ampleford, David; Awe, Thomas J.; Chandler, Gordon A.; Galloway, Benjamin R.; Hansen, Stephanie B.; Hanson, Jeffrey; Harding, Eric; Jennings, Christopher A.; Kimmel, Mark; Knapp, P.F.; Lamppa, Derek C.; Bays, Nathan R.; Mangan, Michael A.; Maurer, Andrew J.; Perea, Lawrence; Peterson, Kara J.; Porter, John L.; Rambo, Patrick K.; Robertson, G.K.; Rochau, Gregory A.; Ruiz, Daniel E.; Shores, Jonathon; Slutz, Stephen A.; Smith, Ian C.; Speas, Christopher S.; Yager-Elorriaga, David A.; York, A.; Paguio, R.R.; Smith, G.E.

Abstract not provided.

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TYPE Conference Presentation YEAR 2021
DOIOSTI

Design and Performance of Kokkos Staging Space toward Scalable Resilient Application Couplings

Zhang, Bo; Davis, Philip E.; Subedi, Pradeep; Parashar, Manish; Rizzi, Francesco; Bays, Nathan R.; Teranishi, Keita

With the growing number of applications designed for heterogeneous HPC devices, application programmers and users are finding it challenging to compose scalable workflows as ensembles of these applications, that are portable, performant and resilient. The Kokkos C++ library has been designed to simplify this cumbersome procedure by providing an intra-application uniform programming model and portable performance. However, assembling multiple Kokkos-enabled applications into a complex workflow is still a challenge. Although Kokkos enables a uniform programming model, the inter-application data exchange still remains a challenge from both performance and software development cost perspectives. In order to address this issue, we propose Kokkos data staging memory space, an extension of Kokkos' data abstraction (memory space) for heterogeneous computing systems. This new abstraction allows to express data on a virtual shared-space for multiple Kokkos applications, thus extending Kokkos to support inter-application data exchange to build an efficient application workflow. Additionally, we study the effectiveness of asynchronous data layout conversions for applications requiring different memory access patterns for the shared data. Our preliminary evaluation with a synthetic benchmark indicate the effectiveness of this conversion adapted to three different scenarios representing access frequency and use patterns of the shared data.

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TYPE SAND Report YEAR 2021
DOIOSTIDOIOSTI

Independent Gamma Spectroscopy Analysis of a Plutonium Oxide Sample

Enghauser, Michael W.

Independent gamma spectroscopy data analysis of a plutonium oxide sample was requested on July 23, 2021. The primary request was to assess the Pu-239 activity/mass of the sample using previously collected gamma spectral data. Using the provided gamma spectral analysis report and spectral files, an independent evaluation of the data was conducted without any prior knowledge of the isotopic activity/mass of the sample.

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TYPE Other Report YEAR 2021
DOIOSTI
Results 12751–12800 of 100,993
Results 12751–12800 of 100,993
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