Collisionless fast-particle confinement in high-β W7-X equilibria

摘要

Fast-particle collisionless confinement in Wendelstein 7-X is revisited exploring the configurational space given by the currents in the modular and auxiliary coils and a two-parameter pressure profile. Preliminary results indicate that at 〈β〉 ~ 0.04 the core-plasma loss cone usually present in stellarators can be approximately eliminated.