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

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.
Authors:
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Stanford Univ., CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-678736
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1258536
Alternate Identifier(s):
OSTI ID: 1249618

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., and Tipton, R. E.. Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility. United States: N. p., Web. doi:10.1063/1.4947223.
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.. Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility. United States. doi:10.1063/1.4947223.
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., and Tipton, R. E.. 2016. "Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility". United States. doi:10.1063/1.4947223. https://www.osti.gov/servlets/purl/1258536.
@article{osti_1258536,
title = {Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility},
author = {Khan, S. F. and MacLaren, S. A. and Salmonson, J. D. and Ma, T. and Kyrala, G. A. and Pino, J. E. and Rygg, J. R. and Field, J. E. and Tommasini, R. and Ralph, J. E. and Turnbull, D. P. and Mackinnon, A. J. and Baker, K. L. and Benedetti, L. R. and Bradley, D. K. and Celliers, P. M. and Dewald, E. L. and Dittrich, T. R. and Berzak Hopkins, L. and Izumi, N. and Kervin, M. L. and Kline, J. L. and Nagel, S. R. and Pak, A. and Tipton, R. E.},
abstractNote = {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.},
doi = {10.1063/1.4947223},
journal = {Physics of Plasmas},
number = 4,
volume = 23,
place = {United States},
year = {2016},
month = {4}
}