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Title: Fast ion transport at a gas-metal interface

Abstract

Fast ion transport and the resulting fusion yield reduction are computed at a gas-metal interface. The extent of fusion yield reduction is observed to depend sensitively on the charge state of the surrounding pusher material and the width of the atomically mixed region. These sensitivities suggest that idealized boundary conditions often implemented at the gas-pusher interface for the purpose of estimating fast ion loss will likely overestimate fusion reactivity reduction in several important limits. Additionally, the impact of a spatially complex material interface is investigated by considering a collection of droplets of the pusher material immersed in a DT plasma. It is found that for small Knudsen numbers, the extent of fusion yield reduction scales with the surface area of the material interface. As the Knudsen number is increased, but, the simple surface area scaling is broken, suggesting that hydrodynamic mix has a nontrivial impact on the extent of fast ion losses.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  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:
1417811
Alternate Identifier(s):
OSTI ID: 1407435
Report Number(s):
LA-UR-17-25628
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; 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

Citation Formats

McDevitt, Christopher J., Tang, Xian-Zhu, and Guo, Zehua. Fast ion transport at a gas-metal interface. United States: N. p., 2017. Web. doi:10.1063/1.4998462.
McDevitt, Christopher J., Tang, Xian-Zhu, & Guo, Zehua. Fast ion transport at a gas-metal interface. United States. doi:10.1063/1.4998462.
McDevitt, Christopher J., Tang, Xian-Zhu, and Guo, Zehua. Mon . "Fast ion transport at a gas-metal interface". United States. doi:10.1063/1.4998462. https://www.osti.gov/servlets/purl/1417811.
@article{osti_1417811,
title = {Fast ion transport at a gas-metal interface},
author = {McDevitt, Christopher J. and Tang, Xian-Zhu and Guo, Zehua},
abstractNote = {Fast ion transport and the resulting fusion yield reduction are computed at a gas-metal interface. The extent of fusion yield reduction is observed to depend sensitively on the charge state of the surrounding pusher material and the width of the atomically mixed region. These sensitivities suggest that idealized boundary conditions often implemented at the gas-pusher interface for the purpose of estimating fast ion loss will likely overestimate fusion reactivity reduction in several important limits. Additionally, the impact of a spatially complex material interface is investigated by considering a collection of droplets of the pusher material immersed in a DT plasma. It is found that for small Knudsen numbers, the extent of fusion yield reduction scales with the surface area of the material interface. As the Knudsen number is increased, but, the simple surface area scaling is broken, suggesting that hydrodynamic mix has a nontrivial impact on the extent of fast ion losses.},
doi = {10.1063/1.4998462},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 11,
volume = 24,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
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