Alpha-Particle Confinement Control of the Geodesic Winding of LHD-Type Fusion Reactors

Tsuguhiro WATANABE
2013 Plasma and Fusion Research  
It is calculated that the geodesic winding D-shaped helical magnetic field configuration can actively control the confinement and exhaust of alpha particles. A trapped particle orbit diagram (TPOD), which shows the presence of re-entering particles and specifies the loss-cone depth, is obtained from the deeply trapped particle orbits in a helical mirror magnetic field. The loss-cone depth becomes shallow when the magnetic axis is shifted to the inner side. On the other hand, the loss-cone depth
more » ... can reach to the magnetic axis when the magnetic axis is shifted fairly to the outer side. Active control of the confinement and exhaust of 3.52 MeV alpha particles by controlling the magnetic axis position is also confirmed by collisionless orbit calculations.
doi:10.1585/pfr.8.2403072 fatcat:o3hbrlmpcnhtrnszkqmhy52vvm