Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator

Cole, M. D.  J.; Moritaka, T.; Hager, R.; Dominski, J.; Ku, S.; Chang, C. S.

doi:10.1063/1.5140232

Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator

Journal Article · Fri Apr 17 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5140232· OSTI ID:1644091

^[1]; Moritaka, T. ^[2]; ^[1]; ^[1]; Ku, S. ^[1]; ^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
National Institute for Fusion Science, Toki (Japan)

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.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; AC02-09CH11466

OSTI ID:: 1644091

Alternate ID(s):: OSTI ID: 1615136

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 27; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Nonlinear global gyrokinetic delta-f turbulence simulations in a quasi-axisymmetric stellarator

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