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Title: Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations

Abstract

The effects of viscosity and small-scale atomic-level mixing on plasmas in inertial confinement fusion(ICF) currently represent challenges in ICF research. Many current ICF hydrodynamic codes ignore the effects of viscosity though recent research indicates viscosity and mixing by classical transport processes may have a substantial impact on implosion dynamics. In this paper, we have implemented a Lagrangian hydrodynamic code in one-dimensional spherical geometry with plasmaviscosity and mass transport and including a three temperature model for ions, electrons, and radiation treated in a gray radiation diffusion approximation. The code is used to study ICF implosion differences with and without plasmaviscosity and to determine the impacts of viscosity on temperature histories and neutron yield. It was found that plasmaviscosity has substantial impacts on ICF shock dynamics characterized by shock burn timing, maximum burn temperatures, convergence ratio, and time history of neutron production rates. Finally, plasmaviscosity reduces the need for artificial viscosity to maintain numerical stability in the Lagrangian formulation and also modifies the flux-limiting needed for electron thermal conduction.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
  4. Univ. of California, Santa Cruz, CA (United States)
  5. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1329869
Alternate Identifier(s):
OSTI ID: 1226676
Report Number(s):
LA-UR-15-24648
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 11; 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; ICF; plasma; viscosity; plasma transport

Citation Formats

Vold, Erik Lehman, Joglekar, Archis S., Ortega, Mario I., Moll, Ryan, Fenn, Daniel, and Molvig, Kim. Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations. United States: N. p., 2015. Web. doi:10.1063/1.4935906.
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Vold, Erik Lehman, Joglekar, Archis S., Ortega, Mario I., Moll, Ryan, Fenn, Daniel, & Molvig, Kim. Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations. United States. https://doi.org/10.1063/1.4935906
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Vold, Erik Lehman, Joglekar, Archis S., Ortega, Mario I., Moll, Ryan, Fenn, Daniel, and Molvig, Kim. Fri . "Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations". United States. https://doi.org/10.1063/1.4935906. https://www.osti.gov/servlets/purl/1329869.
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@article{osti_1329869,
title = {Plasma viscosity with mass transport in spherical inertial confinement fusion implosion simulations},
author = {Vold, Erik Lehman and Joglekar, Archis S. and Ortega, Mario I. and Moll, Ryan and Fenn, Daniel and Molvig, Kim},
abstractNote = {The effects of viscosity and small-scale atomic-level mixing on plasmas in inertial confinement fusion(ICF) currently represent challenges in ICF research. Many current ICF hydrodynamic codes ignore the effects of viscosity though recent research indicates viscosity and mixing by classical transport processes may have a substantial impact on implosion dynamics. In this paper, we have implemented a Lagrangian hydrodynamic code in one-dimensional spherical geometry with plasmaviscosity and mass transport and including a three temperature model for ions, electrons, and radiation treated in a gray radiation diffusion approximation. The code is used to study ICF implosion differences with and without plasmaviscosity and to determine the impacts of viscosity on temperature histories and neutron yield. It was found that plasmaviscosity has substantial impacts on ICF shock dynamics characterized by shock burn timing, maximum burn temperatures, convergence ratio, and time history of neutron production rates. Finally, plasmaviscosity reduces the need for artificial viscosity to maintain numerical stability in the Lagrangian formulation and also modifies the flux-limiting needed for electron thermal conduction.},
doi = {10.1063/1.4935906},
journal = {Physics of Plasmas},
number = 11,
volume = 22,
place = {United States},
year = {Fri Nov 20 00:00:00 EST 2015},
month = {Fri Nov 20 00:00:00 EST 2015}
}
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https://doi.org/10.1063/1.4935906
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    Works referencing / citing this record:

    Observation and modeling of interspecies ion separation in inertial confinement fusion implosions via imaging x-ray spectroscopy
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