Study of a particle Confinemet in the LHD Type Reactor

摘要

The a-particle confinement of the heliotron type reactor is investigated based on three typical LHD configurations with different magnetic axis positions in the major radius. The GNET code is applied, in which the drift kinetic equation for the a-particle is sloved including the particle collisions with background plasma, is applied to evaluate the velocity space distributions, the radial profiles and energy loss rates. It is found that the inward shift of magnetic axis improves the alpha-particle confinement strongly and a sufficient confinement of alpha-particle for fusion reactor is obtained in the strongly inward shifted configuration