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Full-f gyrokinetic simulations of LOC-SOC transition

Idomura, Yasuhiro   ; Dif-Pradalier, G.*; Garbet, X.*; Sarazin, Y.*; Tore Supra Teams*

LOC-SOC (linear and saturated ohmic confinement) transition phenomena in ohmic plasmas on ToreSupra tokamak were analyzed using full-f gyrokinetic simulations on Fugaku, and transition from trapped electron mode turbulence to ion temperature gradient driven turbulence was confirmed between LOC phase (low density, high Zeff) and SOC phase (high density, low Zeff). Numerical experiments qualitatively recovered experimental observations such as changes in energy confinement times and intrinsic rotation profiles, and exhaust of carbon impurity ions.

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