HT-7装置中低杂波电流驱动时的电子温度

Electron Temperature in Lower Hybrid Current Driven Plasmas in HT-7 Tokamak

在HT-7托卡马克实验装置中采用低杂波电流驱动,在不同低杂波功率和电子密度（ne）下,考察中心电子温度和能量约束时间的变化。观察到当ne=1.3×10^19-2.6×10^19m^-3时,中心电子温度随低杂波输入功率的增大而升高;当ne=1.3×10^19m^-3,低杂波输入功率为400 kW时,电子温度最高,达到1.37 keV。在本实验参数范围内,其能量约束时间与ITER89-P L-模定标率十分吻合。比较欧姆加热和低杂波加热下的电子温度分布,当ne=1.71×10^19m^-3,低杂波输入功率为260 kW时,电子温度有明显的温度梯度出现。

This paper investigates the electron temperature and the energy confinement with different electron densities and lower hybrid wave （LHW） injected powers in HT-7 tokamak. The electron temperature increases with the increasing of the LHW power when electron density is from 1.3 ×10^19 to 2. 6 ×10^19 m^-3. The electron temperature reaches the largest value of 1.37 keV when electron density is 1.3 ×10^19 m^-3 and LHW power is 400 kW. Energy confinement time is in good agreement with the low confinement mode scaling law of ITER89-P in these experiments. The large temperature gradient appears obviously in the electron temperature profile when the electron density is 1.71×10^19m-^3 and LHW power is 260 kW.