Simulation of radiative divertor plasmas by Ar seeding with the full W-wall in JT-60SA

Kawashima, Hisato; Shimizu, Katsuhiro; Hoshino, Kazuo; Nakano, Tomohide; Asakura, Nobuyuki

Initial study with assuming the W-wall on JT-60SA is carried out to contribute to the ITER/DEMO metal wall. The W non-coronal model is introduced in the SONIC code together with combination of the non-coronal or the Monte Carlo (IMPMC) model for Ar seeding. In order to obtain the required condition for SOL/Div. ( 10 MW/m, = 3810 m, P20 MW), parameter survey is achieved using the SONIC on the W wall. Results indicate that large D gas puff and Ar ratio n/n (1.010) are needed to obtain the required SOL/Div. conditions at uniformly W ratio (n/n=1.010) in the SOL/Div. space. Considering the distributed n/n from 10 to 10 in SOL/Div. space, regions for the required condition are expanded but Ar injection is essential. It is also found that recycling enhancement is not avoided at the W wall operation. The Ar transport on each charge state is clearly shown by the IMPMC simulation on the W wall. And the IMPMC simulation also obtains similar conditions at non-coronal simulation.