Stabilization of vertical plasma position in the PHiX tokamak with saddle coils
Stabilization of vertical plasma position in the PHiX tokamak with saddle coils
复制标题
使用鞍形线圈稳定 PHiX 托卡马克中的垂直等离子体位置
DOI：
10.1088/1741-4326/ac22d0
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发表时间：
2021
期刊：
影响因子：
3.3
通讯作者：
Hiroaki Tsutsui and Shunji Tsuji-Iio
中科院分区：
文献类型：
--
作者：
Shin Naito;Murayama Masamichi;Shouichi Hatakeyama;Yasuhiro Suzuki;Hiroaki Tsutsui and Shunji Tsuji-Iio
鞍形线圈(SCs)是一种具有垂直等离子体位置稳定效应的线圈。这种效应来自沿磁力线的平均磁场。用磁场线追踪方法研究了SCS和环形磁场线圈(TFC)产生的平均磁场的结构和量化值。在小型托卡马克装置PHiX上也进行了稳定等离子体垂直位置的实验。实验证明，SCS和TFCS产生的平均磁场可以稳定垂直不稳定的等离子体。此外，利用VMEC进行的三维平衡计算表明，当SCS稳定垂直位置时，等离子体在环面上平均垂直拉长。结果表明，SCS产生的非轴对称磁场可以实现垂直位置稳定、截面拉长的等离子体。
Saddle coils (SCs) are proposed as coils with a stabilizing effect of a vertical plasma position. This effect comes from an average magnetic field along a magnetic field line. Magnetic field line tracing was performed to investigate the structure and the quantitative values of the averaged magnetic field generated by SCs and toroidal magnetic field coils (TFCs). Experiments to stabilize the vertical position of the plasma were also carried out in a small tokamak device, PHiX. It was experimentally demonstrated that the averaged magnetic field generated with SCs and TFCs could stabilize the vertically unstable plasmas. In addition, three-dimensional equilibrium calculation using VMEC suggested that the plasmas were vertically elongated on the toroidal average when the vertical positions were stabilized by SCs. From the above results, it was shown that the non-axisymmetric magnetic fields generated by SCs could realize the plasmas with stable vertical position and an elongated cross-section.