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Effects of plasma size and kinetic electron response on momentum transport

Idomura, Yasuhiro   ; Jolliet, S.; Camenen, Y.*

Linear analyzes ITG-TEM turbulence are performed by developing a kinetic electron model in a global gyrokinetic full-f Vlasov code GT5D. Through comparisons with a local flux-tube gyrokinetic code GKW, it is found that finite plasma size effects provide changes in mode structures leading to generation of residual stress. It is also shown that the residual stress changes its sign in each parameter regime where ITG modes or TEM modes are dominant. The result shows that plasma rotation driven by the residual stress may change its direction depending on the dominant modes.

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