Seto, Haruki, Xu, X. Q., Dudson, Benjamin Daniel orcid.org/0000-0002-0094-4867 et al. (1 more author) (2020) Impact of equilibrium radial electric field on energy loss process after pedestal collapse. Contributions to plasma physics. e201900158. ISSN 0863-1042
Abstract
An impact of the equilibrium radial electric field on energy loss processes after pedestal collapse is numerically investigated using the BOUT++ framework. Using linear stability analysis, the resistive ballooning mode is shown to be stabilized by the radial shear of the equilibrium radial electric field. On the other hand, the energy loss level after the pedestal collapse increases if the equilibrium radial electric field is taken into account. The spatio‐temporal and phase diagram analyses show that the equilibrium radial electric field partially cancels the fluctuation‐driven toroidally axisymmetric radial electric field and weakens the E × B shearing rate after pedestal collapse, weakening the turbulence suppression by vortex shearing. The equilibrium radial electric field therefore increases turbulence intensity in nonlinear cyclic oscillations among pressure gradient, E × B shearing rate, and turbulence intensity, which gives rise to subsequent bursts of turbulent transport and increases the energy loss level.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 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: | 16 Apr 2020 11:20 |
Last Modified: | 16 Oct 2024 16:33 |
Published Version: | https://doi.org/10.1002/ctpp.201900158 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1002/ctpp.201900158 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159576 |
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