Speaker
Description
The impacts of pellet mass ablation and deposition that consider the effect of the
particle drift due to the gradient of magnetic field are investigated for
International Thermonuclear Experimental Reactor (ITER) and Demonstration
Nuclear Fusion Power Stations (DEMOs). In the core area, the plasma profiles are
predicted by the TASK/TR code in which the core transport models consist of a
combination of the MMM95 anomalous transport model and NCLASS neoclassical
transport. The pellet ablation in the plasma is described using neutral gas
shielding (NGS) model with inclusion of the $\nabla B$-induced $E\times B$ drift
of the ionized ablated pellet particles. These models are implemented in the HPI2
code that is coupled with the TASK/TR code. It is found that the high-field-side
(HFS) injection can deposit the pellet mass deeper than the injection from the
low-field-side (LFS) due to the advantage of the $\nabla B$-induced drift. The
optimized injection scenarios for achieving the highest fusion performance for
these reactors are also reported in this study.
