On the spatial structure of solitary radial electric field at the plasma edge in toroidal confinement devices

摘要: The solitary radial electric field in the edge of toroidal plasma is studied based on bifurcation model. Results are applied to tokamak and helical plasmas, dependence structure parameters geometrical factors analyzed. order magnitude estimate for not far from experimental observations. It shown that, height reduced substantially owing ripple particle transport, while width influenced less. implications results limit achievable gradient H-mode pedestal also discussed.