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Title: Shock-driven kinetic and diffusive mix in high-Z pusher ICF designs

Abstract

Revolver and Double Shell Inertial Confinement Fusion capsule designs hope to achieve a robust volumetric thermonuclear burn via the use of a high-Z pusher shell filled with a cryogenic D–T fuel. Unfortunately, mix of the pusher material into the fuel (gas) may adversely impact the burn performance. Hydrodynamic instability of the metal/gas interface as the mix source is an obvious concern, but 1D effects may also be detrimental. Such effects include plasma diffusion at material interfaces, which has been the subject of numerous theoretical, computational, and experimental investigations. However, other 1D mix mechanisms may exist, which have yet to be thoroughly explored. In particular, plasma kinetic effects may drive the mix when a shock breaks out of the metal/gas interface. Using the state-of-the-art, hybrid (kinetic-ion/fluid electron), multi-ion Vlasov–Fokker–Planck code, iFP, we show herein that shock-driven kinetic effects can reconfigure the interface and the interfacial width subsequently grows diffusively. Finally, we consider any implications for high-Z pusher designs.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (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:
1604013
Alternate Identifier(s):
OSTI ID: 1599250
Report Number(s):
[LA-UR-19-32053]
[Journal ID: ISSN 1070-664X]
Grant/Contract Number:  
[89233218CNA000001]
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
[ Journal Volume: 27; Journal Issue: 2]; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

Citation Formats

Keenan, Brett D., Taitano, William T., Simakov, Andrei N., Chacon, Luis, and Albright, Brian James. Shock-driven kinetic and diffusive mix in high-Z pusher ICF designs. United States: N. p., 2020. Web. doi:10.1063/1.5140361.
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Keenan, Brett D., Taitano, William T., Simakov, Andrei N., Chacon, Luis, & Albright, Brian James. Shock-driven kinetic and diffusive mix in high-Z pusher ICF designs. United States. doi:10.1063/1.5140361.
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Keenan, Brett D., Taitano, William T., Simakov, Andrei N., Chacon, Luis, and Albright, Brian James. Wed . "Shock-driven kinetic and diffusive mix in high-Z pusher ICF designs". United States. doi:10.1063/1.5140361.
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@article{osti_1604013,
title = {Shock-driven kinetic and diffusive mix in high-Z pusher ICF designs},
author = {Keenan, Brett D. and Taitano, William T. and Simakov, Andrei N. and Chacon, Luis and Albright, Brian James},
abstractNote = {Revolver and Double Shell Inertial Confinement Fusion capsule designs hope to achieve a robust volumetric thermonuclear burn via the use of a high-Z pusher shell filled with a cryogenic D–T fuel. Unfortunately, mix of the pusher material into the fuel (gas) may adversely impact the burn performance. Hydrodynamic instability of the metal/gas interface as the mix source is an obvious concern, but 1D effects may also be detrimental. Such effects include plasma diffusion at material interfaces, which has been the subject of numerous theoretical, computational, and experimental investigations. However, other 1D mix mechanisms may exist, which have yet to be thoroughly explored. In particular, plasma kinetic effects may drive the mix when a shock breaks out of the metal/gas interface. Using the state-of-the-art, hybrid (kinetic-ion/fluid electron), multi-ion Vlasov–Fokker–Planck code, iFP, we show herein that shock-driven kinetic effects can reconfigure the interface and the interfacial width subsequently grows diffusively. Finally, we consider any implications for high-Z pusher designs.},
doi = {10.1063/1.5140361},
journal = {Physics of Plasmas},
number = [2],
volume = [27],
place = {United States},
year = {2020},
month = {2}
}
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DOI:  10.1063/1.5140361
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