Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility

Khan, S. F.; MacLaren, S. A.; Salmonson, J. D.; Ma, T.; Kyrala, G. A.; Pino, J. E.; Rygg, J. R.; Field, J. E.; Tommasini, R.; Ralph, J. E.; Turnbull, D. P.; Mackinnon, A. J.; Baker, K. L.; Benedetti, L. R.; Bradley, D. K.; Celliers, P. M.; Dewald, E. L.; Dittrich, T. R.; Berzak Hopkins, L.; Izumi, N.; Kervin, M. L.; Kline, J. L.; Nagel, S. R.; Pak, A.; Tipton, R. E.

doi:10.1063/1.4947223

Title: Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility

Journal Article · Wed Apr 27 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947223· OSTI ID:1258536

Khan, S. F. ^[1]; MacLaren, S. A. ^[1]; Salmonson, J. D. ^[1]; Ma, T. ^[1]; Kyrala, G. A. ^[2]; Pino, J. E. ^[1]; Rygg, J. R. ^[1]; Field, J. E. ^[1]; Tommasini, R. ^[1]; Ralph, J. E. ^[1]; Turnbull, D. P. ^[1]; Mackinnon, A. J. ^[3]; Baker, K. L. ^[1]; Benedetti, L. R. ^[1]; Bradley, D. K. ^[1]; Celliers, P. M. ^[1]; Dewald, E. L. ^[1]; Dittrich, T. R. ^[1];

^[1]; Izumi, N. ^[1] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Stanford Univ., CA (United States)

Here, we introduce a new quasi 1-D implosion experimental platform at the National Ignition Facility designed to validate physics models as well as to study various Inertial Confinement Fusion aspects such as implosion symmetry, convergence, hydrodynamic instabilities, and shock timing. The platform has been developed to maintain shell sphericity throughout the compression phase and produce a round hot core at stagnation. This platform utilizes a 2-shock 1 MJ pulse with 340 TW peak power in a near-vacuum AuHohlraum and a CH ablator capsule uniformly doped with 1% Si. We also performed several inflight radiography, symmetry capsule, and shock timing experiments in order to tune the symmetry of the capsule to near round throughout several epochs of the implosion. Finally, adjusting the relative powers of the inner and outer cones of beams has allowed us to control the drive at the poles and equator of the capsule, thus providing the mechanism to achieve a spherical capsule convergence. Details and results of the tuning experiments are described.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1258536

Alternate ID(s):: OSTI ID: 1249618

Report Number(s):: LLNL-JRNL-678736; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 23, Issue 4; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry Kyrala, G. A.; Pino, J. E.; Khan, S. F. Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5038570	journal	October 2018
Implosion shape control of high-velocity, large case-to-capsule ratio beryllium ablators at the National Ignition Facility Loomis, E. N.; Yi, S. A.; Kyrala, G. A. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5040995	journal	July 2018
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