The enhancement of edge turbulence in tokamaks by a limiter
The part played by dissipation in the wall shift of potential in SOL has been underestimated for quite some time. However, it both provides an interpretation of the wall turbulence and gives a clue to variation of the latter in experiments with bias current. The edge turbulence control by an electric current flowing to the limiter is discussed. The enhancement of the turbulence is possible due to the variation of the sheath potential at the plasma-surface boundary provided that the positive current flows to a surface. This may be useful for the control of transport in SOL and exhaust of helium and impurities.
Bibliographic Reference: Article: Physics of Fluids B, Vol. 5 (1993) No. 9, pp. 3191-3194
Record Number: 199311379 / Last updated on: 1994-11-28
Original language: en
Available languages: en