A pushered capsule implosion as an alternate approach to the ignition regime for inertial confinement fusion
Abstract
We report in inertial confinement fusion, the threshold for ignition is a highly dynamic quantity as the sources and sinks of power in the hot spot can vary rapidly. In this article, we consider the ignition condition as a race between heating and disassembly rates and make use of a prior solution to the fusion hot-spot thermodynamics to develop a Lawson-like ignition criteria for pressure × confinement time (p-τ) vs temperature. Low-Z capsule designs reach the temperature for this threshold using as much of the shell as feasible as ablator but then are limited in τ by low stagnated mass. An alternate approach, the pushered single shell (PSS) design [D. D.-M. Ho, S. MacLaren, and Y. Wang, “High-yield implosions via radiation trapping and high rho-R,” paper presented at the 60th Annual Meeting of the APS Division of Plasma Physics, 2018], introduces a dense inner layer of Mo-Be alloy that is smoothly graded outward to pure Be, increasing the confinement time at stagnation and lowering the temperature requirement at the ignition threshold. Here, we describe a PSS ignition design for the National Ignition Facility and use the theory as well as simulations to compare it with the low-Z capsule approach. Additionally,more »
- Authors:
-
[1];
[1];
[1];
[1];
[1];
[1];
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- General Atomics, La Jolla, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); General Atomics
- OSTI Identifier:
- 1860748
- Report Number(s):
- LLNL-JRNL-825074
Journal ID: ISSN 1070-664X; 1038713; TRN: US2305429
- Grant/Contract Number:
- AC52-07NA27344; 89233119CNA000063
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 28; Journal Issue: 12; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; plasma confinement; tritium; deuterium; alpha particles; flow instabilities; nuclear fusion
Citation Formats
MacLaren, S. A., Ho, D. D.-M., Hurricane, O. A., Dewald, E. L., Martinez, D. A., Tipton, R. E., Pino, J. E., Young, C. V., Xu, H. W., Kong, C. W., and Sequoia, K. A pushered capsule implosion as an alternate approach to the ignition regime for inertial confinement fusion. United States: N. p., 2021.
Web. doi:10.1063/5.0064971.
MacLaren, S. A., Ho, D. D.-M., Hurricane, O. A., Dewald, E. L., Martinez, D. A., Tipton, R. E., Pino, J. E., Young, C. V., Xu, H. W., Kong, C. W., & Sequoia, K. A pushered capsule implosion as an alternate approach to the ignition regime for inertial confinement fusion. United States. https://doi.org/10.1063/5.0064971
MacLaren, S. A., Ho, D. D.-M., Hurricane, O. A., Dewald, E. L., Martinez, D. A., Tipton, R. E., Pino, J. E., Young, C. V., Xu, H. W., Kong, C. W., and Sequoia, K. Thu .
"A pushered capsule implosion as an alternate approach to the ignition regime for inertial confinement fusion". United States. https://doi.org/10.1063/5.0064971. https://www.osti.gov/servlets/purl/1860748.
@article{osti_1860748,
title = {A pushered capsule implosion as an alternate approach to the ignition regime for inertial confinement fusion},
author = {MacLaren, S. A. and Ho, D. D.-M. and Hurricane, O. A. and Dewald, E. L. and Martinez, D. A. and Tipton, R. E. and Pino, J. E. and Young, C. V. and Xu, H. W. and Kong, C. W. and Sequoia, K.},
abstractNote = {We report in inertial confinement fusion, the threshold for ignition is a highly dynamic quantity as the sources and sinks of power in the hot spot can vary rapidly. In this article, we consider the ignition condition as a race between heating and disassembly rates and make use of a prior solution to the fusion hot-spot thermodynamics to develop a Lawson-like ignition criteria for pressure × confinement time (p-τ) vs temperature. Low-Z capsule designs reach the temperature for this threshold using as much of the shell as feasible as ablator but then are limited in τ by low stagnated mass. An alternate approach, the pushered single shell (PSS) design [D. D.-M. Ho, S. MacLaren, and Y. Wang, “High-yield implosions via radiation trapping and high rho-R,” paper presented at the 60th Annual Meeting of the APS Division of Plasma Physics, 2018], introduces a dense inner layer of Mo-Be alloy that is smoothly graded outward to pure Be, increasing the confinement time at stagnation and lowering the temperature requirement at the ignition threshold. Here, we describe a PSS ignition design for the National Ignition Facility and use the theory as well as simulations to compare it with the low-Z capsule approach. Additionally, we show how an adjustment to the design is used to anticipate the effects of mixing at the fuel–ablator interface.},
doi = {10.1063/5.0064971},
journal = {Physics of Plasmas},
number = 12,
volume = 28,
place = {United States},
year = {Thu Dec 16 00:00:00 EST 2021},
month = {Thu Dec 16 00:00:00 EST 2021}
}
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