Turbulent heating and filament structure of field-aligned current with anomaous resistivity

Intensive turbulent heating occurs in the electrostatic wave turbulence regions (EWTR) existing in the auroral zone of the magnetosphere in the presence of field aligned currents. However, according to observations, the temperature of the bulk of plasma remains constant. The possible mechanism of heat transfer due to ambipolar anomalous diffusion of the small portion of (hot) ions across the EWTR boundaries is suggested. The model kinetic equation for those ions is obtained and solved. According to estimate, heat transfer is the most sufficient for the transfer thickness of the EWTR just of order of 1 km with a sharp spatial inhomogeneity just of order of thermal ion gyroradius.