Investigation of the Parallel Flow in the Edge Plasma of EAST

摘要

The effects of the E×B drift and ballooning-like transport on the edge plasma in EAST tokamak are investigated with a simplified fluid model.The simulation results show that the E×B drift and ballooning-like transport affect the plasma behavior.When the toroidal field is reversed,at the low field side the density is much larger and temperatures(both electron and ion)are lower,and the profiles of the density and temperatures become more symmetric.With the ballooning-like transport considered,the spatial ballooning-like distribution at the low field side is not very important,but the magnitude affects the ratios of the inner/outer particle flux and energy as well as the E×B drift.At the top of the scrape-off layer,the Mach number exceeding 0.3 for the normal toroidal field and approaching 0.2 for the reversed toroidal field in the simulation are obtained when the drift and ballooning-like transport are included in the model.