Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator
Abstract
We use the global gyrokinetic stellarator code XGC-S to look at turbulence physics in geometry of the proposed quasi-axisymmetric stellarator, QUASAR. In this article, the XGC-S code is first verified for nonlinear simulations of ion temperature gradient-driven turbulence by a successful benchmark with the established nonlinear tokamak code XGC1 in a CYCLONE-like tokamak case. We then apply the XGC-S code to QUASAR for nonlinear turbulence physics. We find that the highly poloidally localized linear mode gives way to a more evenly distributed nonlinear turbulent structure. Furthermore, the radial extent of the mode increases and occupies a large fraction of the volume, despite the initially localized temperature profile, as the profiles relax.
- Authors:
-
[1];
[1];
[1];
[1]
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- National Institute for Fusion Science, Toki (Japan)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1644091
- Alternate Identifier(s):
- OSTI ID: 1615136
- Grant/Contract Number:
- AC02-09CH11466; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 4; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Electrostatics; plasma turbulence; stellarators; numerical methods; particle-in-cell method; plasma properties and parameters; turbulence simulations; plasma confinement
Citation Formats
Cole, M. D. J., Moritaka, T., Hager, R., Dominski, J., Ku, S., and Chang, C. S. Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator. United States: N. p., 2020.
Web. doi:10.1063/1.5140232.
Cole, M. D. J., Moritaka, T., Hager, R., Dominski, J., Ku, S., & Chang, C. S. Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator. United States. https://doi.org/10.1063/1.5140232
Cole, M. D. J., Moritaka, T., Hager, R., Dominski, J., Ku, S., and Chang, C. S. Fri .
"Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator". United States. https://doi.org/10.1063/1.5140232. https://www.osti.gov/servlets/purl/1644091.
@article{osti_1644091,
title = {Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator},
author = {Cole, M. D. J. and Moritaka, T. and Hager, R. and Dominski, J. and Ku, S. and Chang, C. S.},
abstractNote = {We use the global gyrokinetic stellarator code XGC-S to look at turbulence physics in geometry of the proposed quasi-axisymmetric stellarator, QUASAR. In this article, the XGC-S code is first verified for nonlinear simulations of ion temperature gradient-driven turbulence by a successful benchmark with the established nonlinear tokamak code XGC1 in a CYCLONE-like tokamak case. We then apply the XGC-S code to QUASAR for nonlinear turbulence physics. We find that the highly poloidally localized linear mode gives way to a more evenly distributed nonlinear turbulent structure. Furthermore, the radial extent of the mode increases and occupies a large fraction of the volume, despite the initially localized temperature profile, as the profiles relax.},
doi = {10.1063/1.5140232},
journal = {Physics of Plasmas},
number = 4,
volume = 27,
place = {United States},
year = {Fri Apr 17 00:00:00 EDT 2020},
month = {Fri Apr 17 00:00:00 EDT 2020}
}
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