Investigation of ion heating/acceleration during merging startup in spherical tokamak

2021年，我们发表了从2D电阻MHD模拟中获得的结果，以研究在合并-压缩和双零合并启动方法中，驱动线圈的基本属性在最大化离子加热方面的作用。紧接着，一个关于熔剂绳形成和合并过程中的压力平衡的问题提出了。二维Hall MHD模拟的结果表明，内环磁场抵消了极向场的衰减，这在磁绳形成阶段是有用的。在进行了多次数值研究后，有必要将外部测量的磁场值耦合到MHD模拟中，以计算由于堆芯等离子体的高温而通常未知的内部等离子体参数，从而提高实验测量的质量。这些研究的结果已经发表在各种期刊上。

In 2021, we published results received from the 2D resistive MHD simulation conducted to study the role of the driving coils basic properties in maximizing the ion heating during the merging-compression and double-null merging startup methods. Right after, a question regarding the pressure balance during the flux rope formation and merging raised. The results of the 2D Hall MHD simulation showed that the internal toroidal magnetic field balances out the decreasing poloidal field which can be useful at the flux rope formation stage. After conducting multiple numerical studies, it became necessary to improve the quality of the experimental measurements by coupling the externally measured magnetic field values to the MHD simulation to calculate the internal plasma parameters which usually are unknown due to the high temperature of the core plasma. The results of these studies have been published in the various journals.