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Fast ion transport at a gas-metal interface.

Authors :
McDevitt, Christopher J.
Tang, Xian-Zhu
Guo, Zehua
Source :
Physics of Plasmas. Nov2017, Vol. 24 Issue 11, p1-12. 12p. 1 Black and White Photograph, 1 Diagram, 11 Graphs.
Publication Year :
2017

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. In addition, 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, however, the simple surface area scaling is broken, suggesting that hydrodynamic mix has a nontrivial impact on the extent of fast ion losses. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1070664X
Volume :
24
Issue :
11
Database :
Academic Search Index
Journal :
Physics of Plasmas
Publication Type :
Academic Journal
Accession number :
126553207
Full Text :
https://doi.org/10.1063/1.4998462