Improved alpha-particle confinement in stellarators with poloidally closed contours of the magnetic field strength
Improved alpha-particle confinement in stellarators with poloidally closed contours of the magnetic field strength
复制标题
改进了具有极向闭合磁场强度轮廓的仿星器中的 α 粒子限制
DOI：
10.1088/0029-5515/42/11/102
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
W. A. Cooper
中科院分区：
文献类型：
--
作者：
M. Mikhailov;V. Shafranov;A. Subbotin;M. Isaev;J. Nührenberg;R. Zille;W. A. Cooper
通过计算仿星器优化，研究了磁场B在磁面上具有多向闭合轮廓的系统满足所有反射粒子第二绝热不变量轮廓极向闭合条件的可能性。结果表明，通过调整几何形状，这在等离子体体积的很大一部分内是可能的。与以前的准等动力构型相比，最显著的特征是磁轴，其曲率在磁轴上的极值B的所有横截面上消失，从而使具有前所未有的高无碰撞α-粒子约束的B的三维结构成为可能。
The possibility of fulfilling the condition of poloidal closure of the contours of the second adiabatic invariant for all reflected particles is studied for systems with poloidally closed contours of the magnetic field B on the magnetic surfaces through computational stellarator optimization. It is shown that by adjusting the geometry this is possible in a major fraction of the plasma volume. The most salient characteristic (as compared to previous quasi-isodynamic configurations) is a magnetic axis whose curvature vanishes in all cross sections with an extremum of B on the magnetic axis and renders possible a three-dimensional structure of B with unprecedentedly high collisionless α-particle confinement.