Calculations of 1/v Transport in an l = 3 Stellarator Magnetic Field in the Presence of Magnetic Islands Caused by Magnetic System Errors

The 1/v neoclassical transport (effective ripple) is calculated for the l = 3 Uragan-3M torsatron in the presence of magnetic islands caused by a small eccentricity in the vertical field coils. The technique used for the calculations is based on integration along magnetic field lines in a given stellarator magnetic field. For comparison, calculations are also performed for the case of negligible eccentricity.