Tokamak等离子体不同运行模式下产生的自举电流

在给定等离子体密度分布下，从电子、离子的能量方程出发，根据不同运行模式下等离子体的热传导率，分别求出了常规剪切L模式和H模式下，以及中心负剪切模式下等离子体电子、离子的温度分布；再根据自举电流产生机制，分别求出了这些运行模式下的自举电流分布，结果表明：在常规剪切模式下，产生自举电流比较小，特别是在L模式下的自举电流更小；在中心负剪切模式下，产生了较大的自举电流，特别在等离子体边缘区域，自举电流大于所要求的电流分布；由于等离子体中心区域自举电流比较小，为了满足等离子体平衡要求，非感应电流驱动是必不可少的。

Bootstrap Current under Different Operational Regimes in Tokamak Plasma

In the given density profile of plasma, the temperature profiles of electron and ion in plasma, which are in the L-Mode and H-Mode of conventional magnetic shear and the mode of negative central magnetic shear, are calculated respectively by applying the energy equation of electron and ion, according to the thermal conductivity coefficient in the different operational regimes. And then the profiles of bootstrap current in the above modes are acquired on the basis of the production mechanism of bootstrap current. The result shows that in the mode of conventional magnetic shear, the bootstrap current is low and even lower especially in the L-Mode. Bootstrap current is high in the mode of negative central magnetic shear; and is higher beyond the requirement especially in the edge area. Because of the low bootstrap current in central area of plasma, the non-induced current driving is necessary for the request of plasma balance.