EFFECTS OF SUPERSONIC BEAM AND PELLET INJECTION ON EDGE ELECTRIC FIELD AND PLASMA ROTATION IN HL-1M TOKAMAK

In the paper,we describe measurements of boundary plasma flow and radial electric field in different discharge conditions on the HL-1M Tokamak. In this ecperiment,it was found that the change of radial electric field E_r is generated at the Tokamak plasma edge during Multi shot Pellet Injection（MPI） and Supersonic Beam Injection（SBI）.Sheared poloidal flow of edge plasma and,concomitantly,significant reduction in the fluctuation level has been observed.