Schworer, David, Walkden, Nicholas Ross, Leggate, Huw et al. (4 more authors) (2018) Influence of plasma background on 3D scrape-off layer filaments. Plasma Physics and Controlled Fusion. 025008. ISSN 1361-6587
Abstract
This paper presents the effect of self-consistent plasma backgrounds including plasma-neutral interactions, on the dynamics of filament propagation. The principle focus is on the influence of the neutrals on the filament through both direct interactions and through their influence on the plasma background. Both direct and indirect interactions influence the motion of filaments. A monotonic increase of filament peak velocity with upstream electron temperature is observed, while a decrease with increasing electron density is observed. If ordered by the target temperature, the density dependence disappears and the filament velocity is only a function of the target temperature. Smaller filaments keep a density dependence, as a result of the density dependence of the plasma viscosity. The critical size δ∗, where filaments are fastest, is shifted to larger sizes for higher densities, due to the plasma viscosity. If the density dependence of the plasma viscosity is removed, δ∗ has no density dependence, but rather a temperature dependence.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Culham Centre for Fusion Energy. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 23 Oct 2018 10:20 |
Last Modified: | 16 Oct 2024 15:11 |
Published Version: | https://doi.org/10.1088/1361-6587/aae8fe |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1088/1361-6587/aae8fe |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:137499 |
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