Experiments to explore the influence of pulse shaping at the National Ignition Facility

Thomas, C. A.; Campbell, E. M.; Baker, K. L.; Casey, D. T.; Hohenberger, M.; Kritcher, A. L.; Spears, B. K.; Khan, S. F.; Nora, R.; Woods, D. T.; Milovich, J. L.; Berger, R. L.; Strozzi, D.; Ho, D. D.; Clark, D.; Bachmann, B.; Benedetti, L. R.; Bionta, R.; Celliers, P. M.; Fittinghoff, D. N.; Grim, G.; Hatarik, R.; Izumi, N.; Kyrala, G.; Ma, T.; Millot, M.; Nagel, S. R.; Patel, P. K.; Yeamans, C.; Nikroo, A.; Tabak, M.; Johnson, M. Gatu; Volegov, P. L.; Finnegan, S. M.

doi:10.1063/5.0019193

Title: Experiments to explore the influence of pulse shaping at the National Ignition Facility

Journal Article · Mon Nov 09 00:00:00 EST 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0019193· OSTI ID:1711433

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Univ. of Rochester, NY (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The shaping of the drive pulse in time is a key tool in the design of fusion experiments that use inertia to confine burning plasmas. Here, it is directly related to the adiabat and compressibility of the DT fuel, and the characteristics of the laser and target that are needed to ignite. With this in mind, we have performed experiments at the National Ignition Facility that test small changes in the shape of the pulse. In contrast to theory, we find implosions at lower adiabats can have reduced yield and areal density. We discuss implications to performance and the mechanism(s) that could be responsible.

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Research Organization:: Univ. of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Contributing Organization:: Laboratory for Laser Energetics, University of Rochester

Grant/Contract Number:: NA0003856; AC52-07NA27344

OSTI ID:: 1711433

Alternate ID(s):: OSTI ID: 1708926

Report Number(s):: 2020-93, 1594, 2549; 2020-93, 1594, 2549; TRN: US2204667

Journal Information:: Physics of Plasmas, Vol. 27, Issue 11; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (27)

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