Pinch Effect in Lower-Hybrid Current Drive Tokamak

Abstract

In current sustaining tokamak by use of Landau damping, resonant particles feel an effective DC field in the toroidal direction to drive the plasma current, and still the rf field reaches thousand times larger than the joule field due to the quasi-linear effect. The time evolution of the density and current profile have been simulated using one dimensional tokamak code including the current drive pinch term due to the inward E_rf×B_θ drift. This effect could be the basis of the improvement of the confinement and the impurity control by the rf travelling wave.