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Magnetic field transport in propagating thermonuclear burn
File(s)
5.0040161.pdf (1.85 MB)
Published version
Author(s)
Appelbe, B
Velikovich, AL
Sherlock, M
Walsh, C
Crilly, A
Type
Journal Article
Abstract
High energy gain in inertial fusion schemes requires the propagation of a thermonuclear burn wave from hot to cold fuel. We consider the problem of burn propagation when a magnetic field is orthogonal to the burn wave. Using an extended-MHD model with a magnetized α energy transport equation, we find that the magnetic field can reduce the rate of burn propagation by suppressing electron thermal conduction and α particle flux. Magnetic field transport during burn propagation is subject to competing effects: the field can be advected from cold to hot regions by ablation of cold fuel, while the Nernst and α particle flux effects transport the field from hot to cold fuel. These effects, combined with the temperature increase due to burn, can cause the electron Hall parameter to grow rapidly at the burn front. This results in the formation of a self-insulating layer between hot and cold fuel, which reduces electron thermal conductivity and α transport, increases the temperature gradient, and reduces the rate of burn propagation.
Date Issued
2021-03-01
Date Acceptance
2021-02-09
Citation
Physics of Plasmas, 2021, 28 (3), pp.1-9
URI
URL
DOI
ISSN
1070-664X
Publisher
American Institute of Physics
Start Page
1
End Page
9
Journal / Book Title
Physics of Plasmas
Volume
28
Issue
3
Copyright Statement
© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://
creativecommons.org/licenses/by/4.0/).
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
AWE Plc
Lawrence Livermore National Laboratory
Lawrence Livermore National Laboratory
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000631012900002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/P010288/1
30469588
B640100
B643873
Subjects
Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Physics
Publication Status
Published
Article Number
ARTN 032705
Date Publish Online
2021-03-05