1. National Research Centre Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182, Russia 2. Max-Planck-Institut für Plasmaphysik, EURATOM Assoziation, Teilinstitut Greifswald, Wendelsteinstr. 1, Greifswald, 17491, Germany
Abstract:
It is shown that the condition of stationary second adiabatic invariant at the magnetic axis of a stellarator configuration can be satisfied to good accuracy for all reflected particles.