DESTABILIZATION OF THE POLOIDAL ROTATION IN A MULTIPLE ION SPECIES TOKAMAK PLASMA

The destabilization of the poloidal rotation for the species of ions w ith the poloidally inhomogeneous sources or sinks is studied in multip le ion species tokamak plasmas. Based on the fluid equations, the evol ution equation of the poloidal ion rotation speed is derived analytica lly. The magnitude of the inhomogeneous sources or sinks needed to des tabilize the rotation is shown to be proportional to the ion density. It is suggested that the poloidal plasma rotation can be generated by destabilizing the rotation of the minority ions.