Estimating Ripple Transport of Moderately-Confined Fast Tritons by D-D Fusion in JT-60SA Tokamak

Abstract

The 1 MeV fast triton transport is analyzed under the presence of magnetic ripple in JT-60SA operation scenario #3 which is expected to employ DD plasma. Particle trajectories were followed using both guiding-center (GC) and full-orbit (FO) equation schemes and the results were compared. We found that there was asmalldifference between the toroidal precession angles or the banana tip positions obtained by GC and FO schemes. Consequently, the ripple-resonance energies estimated by both schemes were different. Although the resonance energies were somewhat different, there is no significant difference between the resonance island size and diffusion coefficients obtained by the GC and FO schemes. Because the resonance energies in the GC scheme are somewhat different from those of the FO scheme, the GC scheme should be carefully applied to the evaluation of tritons confinement in JT-60SA.