Gyrokinetic Vlasov simulations of ITG-TEM driven turbulent transport on realistic tokamak equilibrium

Nakata, Motoki; Honda, Mitsuru; Yoshida, Maiko; Urano, Hajime; Maeyama, Shinya; Nunami, Masanori*; Watanabe, Tomohiko*

First-principle based gyrokinetic simulation is a promising approach for investigating turbulent transport in future burning plasmas such as ITER an DEMO. In this study, ITG-TEM driven turbulent transport simulations on the realistic JT-60U tokamak equilibrium are realized by using a local gyrokinetic turbulence code GKV-J. Linear micro-stability analyses on several radial locations revealed that ITG, ITG-TEM, and TEM modes are dominant for inner, middle, and outer core regions, respectively. The nonlinear turbulence simulation results successfully reproduce the experimental results on ion and electron heat diffusivity in the core region, where the conventional fluid-type reduced transport model shows some deviations. Also, different nonlinear dependences of the turbulence/zonal-flow energy on the ion/electron heat and particle transport levels are newly identified, i.e., weaker impact on the electron heat and particle transport compared to the ion heat one.