Efficient magnetic fields for supporting toroidal plasmas
Efficient magnetic fields for supporting toroidal plasmas
复制标题
支持环形等离子体的高效磁场
DOI：
10.1063/1.4943201
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发表时间：
2016
影响因子：
2.2
通讯作者：
A. Boozer
中科院分区：
文献类型：
--
作者：
M. Landreman;A. Boozer
支撑托卡马克和恒星加速器等离子体的磁场必须由与等离子体完全分开的线圈产生。然而，间隔越大，在等离子体区域产生给定磁场的难度就越大，因此应该选择能够尽可能有效地由远距离线圈支撑的等离子体配置。外部产生的磁场的效率是衡量磁场在等离子体处的成形分量大小与线圈附近的大小的比较；可以使用所需的外部成形磁场的效率来测量等离子体平衡的效率。与直觉相反的是，具有低曲率和光谱宽度的等离子体形状可能具有低效率，而具有尖锐边缘的等离子体形状可能具有高效率。我们将考察两种精确的磁场效率测量方法，这两种方法可以正确地识别难度上的差异。这些测量可以用矩阵来表示，它们将外部产生的法向磁力…
The magnetic field that supports tokamak and stellarator plasmas must be produced by coils well separated from the plasma. However, the larger the separation, the more difficult it is to produce a given magnetic field in the plasma region, so plasma configurations should be chosen that can be supported as efficiently as possible by distant coils. The efficiency of an externally generated magnetic field is a measure of the field's shaping component magnitude at the plasma compared to the magnitude near the coils; the efficiency of a plasma equilibrium can be measured using the efficiency of the required external shaping field. Counterintuitively, plasma shapes with low curvature and spectral width may have low efficiency, whereas plasma shapes with sharp edges may have high efficiency. Two precise measures of magnetic field efficiency, which correctly identify such differences in difficulty, will be examined. These measures, which can be expressed as matrices, relate the externally produced normal magnetic...