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

摘要: 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=1.3×1019～2.6×1019 m-3时，中心电子温度随低杂波输入功率的增大而升高；当ne=1.3×1019 m-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=1.71×1019 m-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。

Abstract: 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 1.3×1019 to 2.6 ×1019m-3. The electron temperature reaches the largest value of 1.37 keV when electron density is 1.3×1019 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 1.71×1019 m-3 and LHW power is 260 kW.