Abstract:Using a numerical code based on guiding centre drift equations, collisionless high energy particle losses, and in particular α-particle losses, are studied for a number of stellarator configurations in the presence of magnetic islands caused by resonant perturbations of magnetic surfaces. Standard stellarator configurations, as well as an optimized quasi-helically symmetric stellarator, are used in this study. It is found that the role of islands in collisionless α-particle losses is practically negligible for… Show more
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