Numerical analysis of deposition distribution of tungsten in JT-60U with IMPGYRO code

Hoshino, Kazuo; Toma, Mitsunori*; Hatayama, Akiyoshi*; Shimizu, Katsuhiro; Takizuka, Tomonori; Ueda, Yoshio*; Nakano, Tomohide; Asakura, Nobuyuki

In order to investigate transport processes of tungsten, tungsten coated tiles were installed in the outer divertor of JT-60U. The poloidal and toroidal distribution of tungsten deposition have been investigated after the experiment campaign. However the transport processes of tungsten have not been clear. In this study, the IMPGYRO code is applied to the analysis of transport process of tungsten to understand the mechanism of tungsten deposition in JT-60U. On the outer doom wing, tungsten directly reaches from the tungsten tile as a neutral due to the low plasma temperature in the private region. The deposition is also observed at the inner divertor due to the transport along the magnetic line of force in the private region.