抄録
On the superconducting high-field tokamak TRIAM-1M, the high performance plasmas has been demonstrated. A high ion temperature (HIT) mode with Ti2.5 keV was sustained for longer than 70 s in the limiter configuration. In the single null divertor configuration, the ion temperature has been achieved at 5 keV as the results of the improvement of plasma-wall interaction. By improvement of the time response of position control, the single null divertor configuration with κ=1.5 can be also sustained successfully for I min. These high performance plasmas have been obtained using 2.45 GHz lower hybrid current drive (LHCD). The current density profile can be controlled sufficiently longer than the current diffusion time using both 2.45 GHz and 8.2 GHz LHCD. The effects on the plasma wall of high energy neutral produced via charge exchange process has been also made clear in the HIT plasma.
