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Title: Design considerations for indirectly driven double shell capsules

Abstract

Here, double shell capsules are predicted to ignite and burn at relatively low temperature (~3 keV) via volume ignition and are a potential low-convergence path to substantial α-heating and possibly ignition at the National Ignition Facility. Double shells consist of a dense, high-Z pusher, which first shock heats and then performs work due to changes in pressure and volume (PdV work) on deuterium-tritium gas, bringing the entire fuel volume to high pressure thermonuclear conditions near implosion stagnation. The high-Z pusher is accelerated via a shock and subsequent compression of an intervening foam cushion by an ablatively driven low-Z outer shell. A broad capsule design parameter space exists due to the inherent flexibility of potential materials for the outer and inner shells and foam cushion. This is narrowed down by design physics choices and the ability to fabricate and assemble the separate pieces forming a double shell capsule. We describe the key physics for good double shell performance, the trade-offs in various design choices, and the challenges for capsule fabrication. Finally, both 1D and 2D calculations from radiation-hydrodynamic simulations are presented.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [2];  [2];  [2];  [2]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1477699
Alternate Identifier(s):
OSTI ID: 1474202
Report Number(s):
LA-UR-18-24347
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 9; 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; thermodynamic properties; plasma confinement; hydrodynamics simulations

Citation Formats

Montgomery, D. S., Daughton, W. S., Albright, B. J., Simakov, A. N., Wilson, D. C., Dodd, E. S., Kirkpatrick, R. C., Watt, R. G., Gunderson, M. A., Loomis, E. N., Merritt, E. C., Cardenas, T., Amendt, P., Milovich, J. L., Robey, H. F., Tipton, R. E., and Rosen, M. D. Design considerations for indirectly driven double shell capsules. United States: N. p., 2018. Web. doi:10.1063/1.5042478.
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Montgomery, D. S., Daughton, W. S., Albright, B. J., Simakov, A. N., Wilson, D. C., Dodd, E. S., Kirkpatrick, R. C., Watt, R. G., Gunderson, M. A., Loomis, E. N., Merritt, E. C., Cardenas, T., Amendt, P., Milovich, J. L., Robey, H. F., Tipton, R. E., & Rosen, M. D. Design considerations for indirectly driven double shell capsules. United States. https://doi.org/10.1063/1.5042478
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Montgomery, D. S., Daughton, W. S., Albright, B. J., Simakov, A. N., Wilson, D. C., Dodd, E. S., Kirkpatrick, R. C., Watt, R. G., Gunderson, M. A., Loomis, E. N., Merritt, E. C., Cardenas, T., Amendt, P., Milovich, J. L., Robey, H. F., Tipton, R. E., and Rosen, M. D. Thu . "Design considerations for indirectly driven double shell capsules". United States. https://doi.org/10.1063/1.5042478. https://www.osti.gov/servlets/purl/1477699.
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@article{osti_1477699,
title = {Design considerations for indirectly driven double shell capsules},
author = {Montgomery, D. S. and Daughton, W. S. and Albright, B. J. and Simakov, A. N. and Wilson, D. C. and Dodd, E. S. and Kirkpatrick, R. C. and Watt, R. G. and Gunderson, M. A. and Loomis, E. N. and Merritt, E. C. and Cardenas, T. and Amendt, P. and Milovich, J. L. and Robey, H. F. and Tipton, R. E. and Rosen, M. D.},
abstractNote = {Here, double shell capsules are predicted to ignite and burn at relatively low temperature (~3 keV) via volume ignition and are a potential low-convergence path to substantial α-heating and possibly ignition at the National Ignition Facility. Double shells consist of a dense, high-Z pusher, which first shock heats and then performs work due to changes in pressure and volume (PdV work) on deuterium-tritium gas, bringing the entire fuel volume to high pressure thermonuclear conditions near implosion stagnation. The high-Z pusher is accelerated via a shock and subsequent compression of an intervening foam cushion by an ablatively driven low-Z outer shell. A broad capsule design parameter space exists due to the inherent flexibility of potential materials for the outer and inner shells and foam cushion. This is narrowed down by design physics choices and the ability to fabricate and assemble the separate pieces forming a double shell capsule. We describe the key physics for good double shell performance, the trade-offs in various design choices, and the challenges for capsule fabrication. Finally, both 1D and 2D calculations from radiation-hydrodynamic simulations are presented.},
doi = {10.1063/1.5042478},
journal = {Physics of Plasmas},
number = 9,
volume = 25,
place = {United States},
year = {Thu Sep 27 00:00:00 EDT 2018},
month = {Thu Sep 27 00:00:00 EDT 2018}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1063/1.5042478
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Cited by: 41 works
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Figures / Tables:

Table 1 Table 1: performance trade‐offs between double shell (volume ignition) capsules and single shell (central hot spot ignition) capsules.
All figures and tables (3 total)
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Works referenced in this record:

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The physics basis for ignition using indirect-drive targets on the National Ignition Facility
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Multimode short-wavelength perturbation growth studies for the National Ignition Facility double-shell ignition target designs
journal, April 2004

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Plastic ablator ignition capsule design for the National Ignition Facility
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    Works referencing / citing this record:

    Convergent Richtmyer–Meshkov instability of light gas layer with perturbed outer surface
    journal, December 2019

    • Li, Jianming; Ding, Juchun; Si, Ting
    • Journal of Fluid Mechanics, Vol. 884
    • DOI: 10.1017/jfm.2019.989

    Experimental study of energy transfer in double shell implosions
    journal, May 2019

    • Merritt, E. C.; Sauppe, J. P.; Loomis, E. N.
    • Physics of Plasmas, Vol. 26, Issue 5
    • DOI: 10.1063/1.5086674

    First experiments on Revolver shell collisions at the OMEGA laser
    journal, July 2019

    • Scheiner, Brett; Schmitt, Mark J.; Hsu, Scott C.
    • Physics of Plasmas, Vol. 26, Issue 7
    • DOI: 10.1063/1.5099975

    Computational study of instability and fill tube mitigation strategies for double shell implosions
    journal, October 2019

    • Haines, Brian M.; Daughton, W. S.; Loomis, E. N.
    • Physics of Plasmas, Vol. 26, Issue 10
    • DOI: 10.1063/1.5115031

    First experiments on Revolver shell collisions at the OMEGA Laser
    text, January 2019

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      Figures / Tables found in this record:

      Table 1 (p. 12)table
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