Investigation of the Parallel Flow in the Edge Plasma of EAST

摘要

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