Reversed-field pinch experiments with a resistive shell

Reversed-field pinch configurations produced in the OHTE device using a resistive shell were maintained for up to 7.5 times the shell resistive time. The plasma density, resistance, and magnetic fluctuations do not evolve significantly while the plasma current is sustained, and the plasma behaviour is similar to that previously observed in conducting shell OHTE/RFP experiments. The experimental observations suggest that a highly conducting shell may not be required for the stability of a reversed-field pinch. (author)