HL-1M边缘等离子体静电湍流扰动

ELECTROSTATIC TURBULENT FLUCTUATION INTHE HL1M EDGE PLASMA

对HL 1M边缘等离子体静电湍流扰动进行了初步的实验研究。获得了扰动的基本特征量,估计了低杂波引起的径向粒子流的变化。在加低杂波(2 45GHz)前、后,电子密度扰动和极向电场扰动的幅度及其关联性变化不大。虽然低杂波部分抑制了静电湍流,但在数量上不能解释粒子约束改善的实验结果。

Initial study of the electrostatic turbulent fluctuation at the edge region in the HL1M plasma has been performed.Fundamental characteristics of the fluctuation have been obtained,and the change of the fluctuationinduced radial particle flux due to lower hybrid wave (LHW) is estimated.Experimental results show that LHW (2.45GHz) does not cause great changes in the amplitude of electron density or poloidal electric field fluctuation,neither the correlativity between them.LHW partly represses the electrostatic turbulence,but the enhancement of the particle confinement during LHCD in the HL1M plasma cannot be explained by this repression.