EQUILIBRIUM AND STABILITY CONTROL OF HELIOTRON TORSATRON WITH DRIVEN CURRENT

In order to elucidate the role of the net toroidal plasma current in t oroidal plasmas, many experiments for studying stellarator/heliotron p lasmas with an ohmic heating current or current drive by lower hybrid waves have been carried out. The effects of the net toroidal plasma cu rrent on stellarator/heliotron plasmas are reviewed from both theoreti cal and experimental standpoints in order to understand the difference s and similarities between the tokamak and stellarator/heliotron. Poss ibilities for improving the confinement in heliotron/torsatron devices are addressed.