HIGH POWER LONG PULSE PERFORMANCE OF THE DIII―D GYROTRON INSTALLATION

摘要

At DIII-D, five 110 GHz gyrotrons are operating routinely for 2.0 s pulses at generated power levels ≥750 kW per gyrotron. A sixth gyrotron is being installed, which should bring the generated power level to >4 MW and the injected power to about 3.0 MW. The output power now can be modulated by the plasma control system to fix T_e at a desired value. The system is being used as a tool for control of current diffusion, for current profile control and other experiments leading to advanced tokamak operation.