Experimental Research on Lower Hybrid Current Drive in Superconducting Tikamak HT-7

摘要

Fundamental experimetns on lower hybrid current drive (LHCD) have been under taken on HT-7 superconducting tokamak. The experiments on LHCD efficiency reveal its dependence on plasma density and the toroidal magnetic field. Furthermorel, the experiments on HT-7 successfully demosntrate the abiltiy for LHCD to sustain long pulse tokamak discharges, such as discharges with full non-ionductive current drive for several seconds. The experimental study to improve plasma confiements by LHCD suggests that the improvement should be due to the change of current profile. It has also been demosntrated by the experimetns that the lower hydrid wave may lead to an enhanced ionization of particles in the region where the wave is deposited.