A collisionless self-organizing model for the high-confinement (H-mode) boundary layer

It is shown that in a collisionless two-fluid model, a combination of the Hall term and fluid vorticity can lead to the formation of a self-organized singular layer that displays the essential observational features of the thin shear layer associated with the high-confinement (H-mode) tokamak discharges: the layer width is of the order of a poloidal gyroradius, the poloidal velocity of the order of poloidal Mach number unity, and an electrostatic potential (yielding a negative electric field) of the order of the edge plasma temperature. (C) 2000 American Institute of Physics. [S1070-664X(00)02902-5].