Effect of anomalous plasma transport on radial electric field in torsatron/heliotron

摘要

Anomalous cross field plasma fluxes induced by the electric field fluctuations has been evaluated in a rotating plasma with shear flow in a helical system. The plasma rotation frequency due to the radial electric field makes the Doppler frequency shift which does not explicitly affect the cross field flux. The anomalous ion flux is evaluated by the ion curvature drift resonance continuum in the test particle model. The curvature drift resonance induces a new force term '/ which did not make large influence in the ion flux. The shear flow term in the anomalous flux combined with the electric field in neoclassical flux reduces to a first order differential equation which governs the radial profile of the electric field. A general exact analytical solution for the differential equation is derived and a simple approximate solution for the radial electric field is also given. Numerical results indicate that the shear flow effect is important for the anomalous cross field flux and for determination of the radial electric field particularly in the peripheral region. (author). (ERA citation 20:014527)