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Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies
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(2023) Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies. Plasma Physics and Controlled Fusion, 66 (2). 025005. doi:10.1088/1361-6587/ad15ee ISSN 1361-6587.
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Official URL: https://doi.org/10.1088/1361-6587/ad15ee
Abstract
Low convergence ratio implosions (where wetted-foam layers are used to limit capsule convergence, achieving improved robustness to instability growth) and auxiliary heating (where electron beams are used to provide collisionless heating of a hotspot) are two promising techniques that are being explored for inertial fusion energy applications. In this paper, a new analytic study is presented to understand and predict the performance of these implosions. Firstly, conventional gain models are adapted to produce gain curves for fixed convergence ratios, which are shown to well-describe previously simulated results. Secondly, auxiliary heating is demonstrated to be well understood and interpreted through the burn-up fraction of the deuterium-tritium fuel, with the gradient of burn-up with respect to burn-averaged temperature shown to provide good qualitative predictions of the effectiveness of this technique for a given implosion. Simulations of auxiliary heating for a range of implosions are presented in support of this and demonstrate that this heating can have significant benefit for high gain implosions, being most effective when the burn-averaged temperature is between 5 and 20 keV.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Plasma Physics and Controlled Fusion | ||||||
Publisher: | IOP Publishing | ||||||
ISSN: | 1361-6587 | ||||||
Official Date: | 27 December 2023 | ||||||
Dates: |
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Volume: | 66 | ||||||
Number: | 2 | ||||||
Article Number: | 025005 | ||||||
DOI: | 10.1088/1361-6587/ad15ee | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Copyright Holders: | © 2023 The Author(s). Published by IOP Publishing Ltd | ||||||
Date of first compliant deposit: | 1 February 2024 | ||||||
Date of first compliant Open Access: | 1 February 2024 | ||||||
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