Shanahan, Brendan William, Dudson, Benjamin Daniel orcid.org/0000-0002-0094-4867 and Hill, Peter Alec orcid.org/0000-0003-3092-1858 (2018) The effects of non-uniform drive on plasma filaments. Journal of Physics: Conference Series. 012018. ISSN 1742-6596
Abstract
Wendelstein 7-X core fueling is primarily achieved through pellet injection. The trajectory of plasmoids from an ablating pellet is an ongoing research question, which is complicated by the complex magnetic geometry of W7-X; curvature drive varies significantly toroidally, including a change in the drift drive direction. Here we use the Hermes model in BOUT++ to simulate cold plasma filaments in slab geometries where the magnetic drift drive is non-uniform along the field line. It is shown that if the field-line-averaged curvature drive is non-zero, a filament will propagate coherently in the direction of average drive. It is also shown that a non-uniform drive will provide a non-uniform propagation; an effect which is reduced at higher temperatures due to an increased sound speed along the field line. Finally, simulations with curvature similar to that found in Wendelstein 7-X are performed which indicate a slow radial propagation of plasma filaments despite a highly non-uniform drive profile.
Metadata
Item Type: | Article |
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Authors/Creators: |
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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: | 20 Jun 2019 10:50 |
Last Modified: | 16 Oct 2024 15:08 |
Published Version: | https://doi.org/10.1088/1742-6596/1125/1/012018 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1088/1742-6596/1125/1/012018 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147619 |
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Filename: Shanahan_2018_J._Phys._Conf._Ser._1125_012018.pdf
Description: The effects of non-uniform drive on plasma filaments
Licence: CC-BY 2.5