托卡马克等离子体湍流杂质输运的理论研究

为了保证磁约束聚变装置的高参数稳态运行，需要防止杂质聚芯，这对精准地理解和预测杂质输运的行为和规律提出了极高的要求。大量实验结果表明，杂质输运也是反常的，被认为是由等离子体微观湍流所主导的。但是，人们对杂质输运的理解，无论是实验角度还是理论角度，都严重滞后于对等离子体热输运、粒子输运的理解。因此，湍流杂质输运是磁约束聚变研究亟待解决的重点和难点问题之一。本项目计划针对微观湍流和杂质的互相影响展开一系列有原创性的理论研究，研究内容包括：湍流杂质输运的等离子体参数依赖和同位素依赖、流剪切不稳定性驱动的杂质输运、杂质对带状流的影响。这一项目的开展有助于我们更深入、更全面地理解杂质输运，可能为将来ITER燃烧等离子体中杂质行为的预测和有效控制提供理论基础。

To ensure steady state high performance operation of magnetic confinement fusion devices, it is necessary to avoid impurity accumulation in core plasmas, which requires accurate understanding and predictions of the impurity transport behaviors. Various experimental results indicate that impurity transport is also anomalous, which is dominated by mirco-turbulence. However, from both experimental and theoretical perspectives, turbulent impurity transport is much less understood than heat transport and particle transport. Therefore, turbulent impurity transport is one of the most important and difficult issues in magnetic fusion research field. This proposal is plan to investigate the turbulent impurity transport and impurity effects on plasmas, including parametric dependence and isotopic dependence of turbulent impurity transport, flow shear instability induced impurity transport, and impurity effects on residual zonal flow. This study is helpful for us to deeply and comprehensively understand impurity transport, could be also provide theory foundations for predictions and effective control of impurity behaviors in burning plasmas of future ITER.