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Predictive transport simulations consistent with rotation and radial electric field using TOPICS with OFMC

Honda, Mitsuru; Hayashi, Nobuhiko; Takizuka, Tomonori*; Yoshida, Maiko; Fujita, Takaaki

A toroidal momentum solver has been derived for the 1.5D integrated transport code TOPICS from the equation of motion. A novel scheme that can uniquely determine the radial electric field Er without iterative calculations has also been modeled based on the neoclassical transport theory. The combination of TOPICS and OFMC enables us to predict the evolution of not only the density, temperature and safety factor but also the toroidal momentum and $$E_r$$. The framework developed has been tested against experiments and showed the predictive capability of toroidal rotation profile. Several time-dependent simulations in which toroidal rotation and $$E_r$$ play a important role have been carried out, showing that the turbulence suppression due to the steep Er gradient is of crucial importance in the formation of transport barriers and the direction of toroidal rotation significantly alters the confinement via the change in $$E_r$$.

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