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Title: Polar-direct-drive experiments on the National Ignition Facility

Abstract

To support direct-drive inertial confinement fusion experiments at the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 43, 2841 (2004)] in its indirect-drive beam configuration, the polar-direct-drive (PDD) concept [S. Skupsky et al., Phys. Plasmas 11, 2763 (2004)] has been proposed. Ignition in PDD geometry requires direct-drive–specific beam smoothing, phase plates, and repointing the NIF beams toward the equator to ensure symmetric target irradiation. First experiments to study the energetics and preheat in PDD implosions at the NIF have been performed. These experiments utilize the NIF in its current configuration, including beam geometry, phase plates, and beam smoothing. Room-temperature, 2.2-mm-diam plastic shells filled with D2 gas were imploded with total drive energies ranging from ~500-750 kJ with peak powers of 120 to 180 TW and peak on-target irradiances at the initial target radius from 8 x 1014 to 1.2 x 1015 W/cm2. Results from these initial experiments are presented, including measurements of shell trajectory, implosion symmetry, and the level of hot-electron preheat in plastic and Si ablators. Experiments are simulated with the 2-D hydrodynamics code DRACO including a full 3-D ray-trace to model oblique beams, and models for nonlocal electron transport andmore » cross-beam energy transport (CBET). These simulations indicate that CBET affects the shell symmetry and leads to a loss of energy imparted onto the shell, consistent with the experimental data.« less

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [3];  [1];  [1];  [1];  [2];  [1]; ORCiD logo [1];  [1];  [1] more »; ORCiD logo [1];  [1];  [4]; ORCiD logo [5];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [1];  [4];  [1];  [2];  [2];  [2]; ORCiD logo [2];  [1];  [1];  [2];  [1]; ORCiD logo [2]; ORCiD logo [4];  [3];  [5];  [2];  [5];  [1];  [6];  [2];  [3];  [2];  [1];  [1];  [1];  [1]; ORCiD logo [1] « less
+ Show Author Affiliations
  1. Lab. for Laser Energetics, University of Rochester, Rochester, NY (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. U. S. Naval Research Lab., Washington, DC (United States)
  4. General Atomics, San Diego, CA (United States)
  5. MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)
  6. U. S. Naval Research Lab., Washington, DC 20375, (United States)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1182632
Alternate Identifier(s):
OSTI ID: 1228221; OSTI ID: 1249141
Report Number(s):
LLNL-JRNL-664443
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
NA0001857; NA0001944; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION

Citation Formats

Hohenberger, M., Radha, P. B., Myatt, J. F., LePape, S., Marozas, J. A., Marshall, F. J., Michel, D. T., Regan, S. P., Seka, W., Shvydky, A., Sangster, T. C., Bates, J. W., Betti, R., Boehly, T. R., Bonino, M. J., Casey, D. T., Collins, T. J. B., Craxton, R. S., Delettrez, J. A., Edgell, D. H., Epstein, R., Fiksel, G., Fitzsimmons, P., Frenje, J. A., Froula, D. H., Goncharov, V. N., Harding, D. R., Kalantar, D. H., Karasik, M., Kessler, T. J., Kilkenny, J. D., Knauer, J. P., Kurz, C., Lafon, M., LaFortune, K. N., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., McCrory, R. L., McKenty, P. W., Meeker, J. F., Meyerhofer, D. D., Nagel, S. R., Nikroo, A., Obenschain, S., Petrasso, R. D., Ralph, J. E., Rinderknecht, H. G., Rosenberg, M. J., Schmitt, A. J., Wallace, R. J., Weaver, J., Widmayer, C., Skupsky, S., Solodov, A. A., Stoeckl, C., Yaakobi, B., and Zuegel, J. D. Polar-direct-drive experiments on the National Ignition Facility. United States: N. p., 2015. Web. doi:10.1063/1.4920958.
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Hohenberger, M., Radha, P. B., Myatt, J. F., LePape, S., Marozas, J. A., Marshall, F. J., Michel, D. T., Regan, S. P., Seka, W., Shvydky, A., Sangster, T. C., Bates, J. W., Betti, R., Boehly, T. R., Bonino, M. J., Casey, D. T., Collins, T. J. B., Craxton, R. S., Delettrez, J. A., Edgell, D. H., Epstein, R., Fiksel, G., Fitzsimmons, P., Frenje, J. A., Froula, D. H., Goncharov, V. N., Harding, D. R., Kalantar, D. H., Karasik, M., Kessler, T. J., Kilkenny, J. D., Knauer, J. P., Kurz, C., Lafon, M., LaFortune, K. N., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., McCrory, R. L., McKenty, P. W., Meeker, J. F., Meyerhofer, D. D., Nagel, S. R., Nikroo, A., Obenschain, S., Petrasso, R. D., Ralph, J. E., Rinderknecht, H. G., Rosenberg, M. J., Schmitt, A. J., Wallace, R. J., Weaver, J., Widmayer, C., Skupsky, S., Solodov, A. A., Stoeckl, C., Yaakobi, B., & Zuegel, J. D. Polar-direct-drive experiments on the National Ignition Facility. United States. https://doi.org/10.1063/1.4920958
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Hohenberger, M., Radha, P. B., Myatt, J. F., LePape, S., Marozas, J. A., Marshall, F. J., Michel, D. T., Regan, S. P., Seka, W., Shvydky, A., Sangster, T. C., Bates, J. W., Betti, R., Boehly, T. R., Bonino, M. J., Casey, D. T., Collins, T. J. B., Craxton, R. S., Delettrez, J. A., Edgell, D. H., Epstein, R., Fiksel, G., Fitzsimmons, P., Frenje, J. A., Froula, D. H., Goncharov, V. N., Harding, D. R., Kalantar, D. H., Karasik, M., Kessler, T. J., Kilkenny, J. D., Knauer, J. P., Kurz, C., Lafon, M., LaFortune, K. N., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., McCrory, R. L., McKenty, P. W., Meeker, J. F., Meyerhofer, D. D., Nagel, S. R., Nikroo, A., Obenschain, S., Petrasso, R. D., Ralph, J. E., Rinderknecht, H. G., Rosenberg, M. J., Schmitt, A. J., Wallace, R. J., Weaver, J., Widmayer, C., Skupsky, S., Solodov, A. A., Stoeckl, C., Yaakobi, B., and Zuegel, J. D. Mon . "Polar-direct-drive experiments on the National Ignition Facility". United States. https://doi.org/10.1063/1.4920958. https://www.osti.gov/servlets/purl/1182632.
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@article{osti_1182632,
title = {Polar-direct-drive experiments on the National Ignition Facility},
author = {Hohenberger, M. and Radha, P. B. and Myatt, J. F. and LePape, S. and Marozas, J. A. and Marshall, F. J. and Michel, D. T. and Regan, S. P. and Seka, W. and Shvydky, A. and Sangster, T. C. and Bates, J. W. and Betti, R. and Boehly, T. R. and Bonino, M. J. and Casey, D. T. and Collins, T. J. B. and Craxton, R. S. and Delettrez, J. A. and Edgell, D. H. and Epstein, R. and Fiksel, G. and Fitzsimmons, P. and Frenje, J. A. and Froula, D. H. and Goncharov, V. N. and Harding, D. R. and Kalantar, D. H. and Karasik, M. and Kessler, T. J. and Kilkenny, J. D. and Knauer, J. P. and Kurz, C. and Lafon, M. and LaFortune, K. N. and MacGowan, B. J. and Mackinnon, A. J. and MacPhee, A. G. and McCrory, R. L. and McKenty, P. W. and Meeker, J. F. and Meyerhofer, D. D. and Nagel, S. R. and Nikroo, A. and Obenschain, S. and Petrasso, R. D. and Ralph, J. E. and Rinderknecht, H. G. and Rosenberg, M. J. and Schmitt, A. J. and Wallace, R. J. and Weaver, J. and Widmayer, C. and Skupsky, S. and Solodov, A. A. and Stoeckl, C. and Yaakobi, B. and Zuegel, J. D.},
abstractNote = {To support direct-drive inertial confinement fusion experiments at the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 43, 2841 (2004)] in its indirect-drive beam configuration, the polar-direct-drive (PDD) concept [S. Skupsky et al., Phys. Plasmas 11, 2763 (2004)] has been proposed. Ignition in PDD geometry requires direct-drive–specific beam smoothing, phase plates, and repointing the NIF beams toward the equator to ensure symmetric target irradiation. First experiments to study the energetics and preheat in PDD implosions at the NIF have been performed. These experiments utilize the NIF in its current configuration, including beam geometry, phase plates, and beam smoothing. Room-temperature, 2.2-mm-diam plastic shells filled with D2 gas were imploded with total drive energies ranging from ~500-750 kJ with peak powers of 120 to 180 TW and peak on-target irradiances at the initial target radius from 8 x 1014 to 1.2 x 1015 W/cm2. Results from these initial experiments are presented, including measurements of shell trajectory, implosion symmetry, and the level of hot-electron preheat in plastic and Si ablators. Experiments are simulated with the 2-D hydrodynamics code DRACO including a full 3-D ray-trace to model oblique beams, and models for nonlocal electron transport and cross-beam energy transport (CBET). These simulations indicate that CBET affects the shell symmetry and leads to a loss of energy imparted onto the shell, consistent with the experimental data.},
doi = {10.1063/1.4920958},
journal = {Physics of Plasmas},
number = 5,
volume = 22,
place = {United States},
year = {Mon May 11 00:00:00 EDT 2015},
month = {Mon May 11 00:00:00 EDT 2015}
}
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    journal, July 2018

    • Collins, T. J. B.; Marozas, J. A.
    • Physics of Plasmas, Vol. 25, Issue 7
    • DOI: 10.1063/1.5039513

    Spectral composition of thermonuclear particle and recoil nuclear emissions from laser fusion targets intended for modern ignition experiments
    journal, June 2018

    • Gus’kov, S. Yu; Il’in, D. V.; Perlado, J. M.
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 8
    • DOI: 10.1088/1361-6587/aac739

    Compression and burning of a direct-driven thermonuclear target under the conditions of inhomogeneous heating by a multi-beam megajoule laser
    journal, January 2019

    • Bel’kov, S. A.; Bondarenko, S. V.; Demchenko, N. N.
    • Plasma Physics and Controlled Fusion, Vol. 61, Issue 2
    • DOI: 10.1088/1361-6587/aaf062

    The National Direct-Drive Inertial Confinement Fusion Program
    journal, December 2018

    Hydrodynamic simulations of long-scale-length plasmas for two-plasmon-decay planar-target experiments on the NIF
    journal, May 2016

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