Ku, S., Chang, C. S., Hager, R. et al. (9 more authors) (2018) A fast low-to-high confinement mode bifurcation dynamics in the boundary-plasma gyrokinetic code XGC1. Physics of Plasmas. 056107. ISSN 1089-7674
Abstract
A fast edge turbulence suppression event has been simulated in the electrostatic version of the gyrokinetic particle-in-cell code XGC1 in a realistic diverted tokamak edge geometry under neutral particle recycling. The results show that the sequence of turbulent Reynolds stress followed by neoclassical ion orbit-loss driven together conspire to form the sustaining radial electric field shear and to quench turbulent transport just inside the last closed magnetic flux surface. The main suppression action is located in a thin radial layer around ψN ≅ 0.96–0.98, where ψN is the normalized poloidal flux, with the time scale ~0.1 ms.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | 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: | 12 Jul 2018 13:40 |
Last Modified: | 21 Jan 2025 17:34 |
Published Version: | https://doi.org/10.1063/1.5020792 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1063/1.5020792 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:133265 |
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Filename: 1.5020792.pdf
Description: A fast low-to-high confinement mode bifurcation dynamics in the boundary-plasma gyrokinetic code XGC1