ITG模在托卡马克等离子体反常输运中的作用

The effect of ITG mode on anomalous transport in Tokamak plasma

依据一种基于流体近似理论构建的简化模型,模拟计算了JET装置中的等离子体输运过程,考察讨论了离子温度梯度(ITG)模在反常输运过程的作用.计算结果表明,在低约束状态下离子的密度梯度整体平缓,反常输运由ITG模主导;当辅助加热功率增大到一定阈值后,在等离子体边缘将产生陡峭的密度梯度,这使ITG模在边缘区域受到强烈的抑制.

Based on a simple transport model according to the theory of the fluid approximation, the effect of ion temperature gradient （ITG） mode on the anomalous transport in the modelling of the JET tokamak is numerically investigated. The results show that the density gradient of ions changes gently and the ITG mode dominates the transport in low confinement mode, on the contrary, when the heating power is increased upto a threshold, a steeper density gradient can be formed in the edge, resulting in the suppression of ITG mode effectively in the area of edge plasma.