Integral Suppression of Pfirsch-Schltiter Gurrent in the Inward Shifted Stellarator Plasma in Heliotron E

Observation of the complete suppression of integral effect of Pfirsch-Schhiter current in Heliotron E plasmas is reported. Poloidal magnetic field was measured to control the plasma boundary position. We found that pressure-induced plasma shift, an observable characteristic of Pfirsch-Schliiter current, depends strongly on the initial position of magnetic axis. When it was moved by the vertical field inside the torus, finite-B shift became smaller. Complete suppression of finite-B shift was achieved in a deeply inward shifted configuration:7 cm from the standard position R^,r":2.20 m. Observed effect is ex- plained by MHD equilibrium theory for planar circular axis stellarator plasma with a high magnetic hill and deep inward shift.