Abstract

To design the alternating current operation of the J-text tokamak, this paper studies the plasma equilibrium during the plasma toroidal current reversing. First, four alternative current reversal equilibrium configurations with circular cross section when the total toroidal current becomes zero were constructed. Then, the profile of the plasma current was used as the input of a fixed boundary equilibrium solver to calculate the poloidal field coil currents. According to the results, the relationship between the plasma current distribution and currents in ohmic heating coils and vertical field coils is discussed. Finally, the plasma equlibrium of a toroidal current reversal with total plasma current from 40 kA to –40 kA in 40 ms was designed.

摘要

为了设计J-text托卡马克的交流操作，本文研究了等离子体环形电流反转过程中的等离子体平衡。首先，构建了当总环形电流变为零时具有圆形横截面的四个交替电流反向平衡配置。然后，等离子体电流的轮廓被用作固定边界平衡求解器的输入来计算极向场线圈电流。根据结果​​，讨论了等离子电流分布与欧姆加热线圈和垂直磁场线圈中电流的关系。最后，设计了环形电流反转的等离子体平衡，总等离子体电流在 40 ms 内从 40 kA 到 –40 kA。