Transport and plasma current in W VII-AS

For the rather complex magnetic field topology of W VII-AS stellarator, the full neoclassical transport matrix with radial electric field included in both the plateau and long mean free path regimes was calculated using the DKES code. Electron temperature and density profiles measured by the Thomson scattering diagnostic for ECF heated discharges (at both fundamental and 2nd harmonic heating) were analyzed, the electron heat conductivity coefficient was estimated and compared with the neoclassical prediction. Based on the measured profiles, the neoclassical bootstrap current was calculated. To the net toroidal current contribute a pressure driven component, an ECH generated and a component induced by a small loop voltage. The pressure driven component was in rough agreement with the prediction for the neoclassical bootstrap current. (author). 7 refs, 3 figs