A reversal of toroidal flow is observed in plasmas where a large positive electric field and a sharp electron temperature gradient are sustained inside the internal transport barrier in a compact helical system. This observation shows that the spontaneous toroidal flow in the direction anti-parallel to the <Er × Bθ> drift becomes large enough to reverse the toroidal flow driven by a tangentially injected neutral beam. The difference in the direction and the magnitude of the spontaneous toroidal flow are also discussed.
All Science Journal Classification (ASJC) codes
- Nuclear Energy and Engineering
- Condensed Matter Physics