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Shiraishi, Junya; Tokuda, Shinji*
no journal, ,
no abstracts in English
Aiba, Nobuyuki; Shiraishi, Junya; Tokuda, Shinji*; Yagi, Masatoshi
no journal, ,
Numerical analysis is performed for identifying the poloidal rotation effect on the stability of edge localized MHD mode, which relates to the type-I ELM, and that of the resistive wall mode (RWM), which sometimes causes a disruption. This analysis clarifies that the poloidal rotation observed experimentally can destabilize the edge localized MHD mode but stabilize RWM. Furthermore, when the plasma rotates in both the toroidal and the poloidal directions, MHD stability depends on the direction of the toroidal rotation. This dependence is qualitatively consistent with the experimental result of the relation between ELM phenomena and the toroidal rotation direction in JT-60U. Though this dependence of RWM is not discussed until now, this result suggests that we need to confirm whether or not this dependence can be observed experimentally to stabilize RWM in JT-60SA and ITER.
Honda, Mitsuru; Takizuka, Tomonori; Tobita, Kenji; Matsunaga, Go; Fukuyama, Atsushi*
no journal, ,
no abstracts in English
Miyato, Naoaki; Scott, B. D.*
no journal, ,
Reduced kinetic models such as the gyrokinetic model are constructed by a phase space transformation from the particle phase space with the particle position and the particle velocity to a guiding-centre phase space. Usual particle fluid moments are expressed in terms of fluid moments defined as integrals in the guiding-centre phase space. It is called the push-forward representation. In this paper, we discuss differences and common points among the representation associated with a modified guiding-centre model for flowing plasmas which we derived recently, the one associated with the conventional model for flowing plasmas and the standard one without fast flow.