DETAILED RESULTS OF MONTE-CARLO SIMULATION OF NEOCLASSICAL TRANSPORT IN STELLARATORS
Neoclassical transport coefficients are computed by Monte Carlo simulation over a wide range of mean free paths in the approximation of small gyroradius, monoenergetic particle distribution, and vanishing electric field for several stellarator fields. Pfirsch-Schlueter, plateau, and ripple transport coefficients are obtained. The transport coefficients for l=2 stellarators in the ripple regime can be described as a single function of the aspect ratio, the rotational transform, and the number of periods. We present here stellarator configurations in which transport is reduced by a factor of 2 to 4 in all three regimes as compared with a tokamak with equal aspect ratio and effective ripple and by a factor of up to 8 as compared with an equivalent l=2 stellarator. Transport in actual stellarators (ATF-1, Heliotron-E, W VII-AS) is moderately worse than in the equivalent l=2 stellarator.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP III 0/48, 1984
Record Number: 1989123024100 / Last updated on: 1987-01-01
Available languages: en