Two Dimensional Field Reversed Equilibria with Plasma outside the Separatrix
Two Dimensional Field Reversed Equilibria with Plasma outside the Separatrix
复制标题
二维场与分界线外等离子体的逆平衡
DOI：
10.1143/jpsj.54.2155
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发表时间：
1985
影响因子：
1.7
通讯作者：
Kiyomitsu Suzuki
中科院分区：
文献类型：
--
作者：
Kiyomitsu Suzuki
研究了场反转位形与分界线外等离子体的二维平衡。通过数值计算，发现界面（β =0）随着β s（表面β比β =0）的增大而变得细长。值得注意的是，当β s增大到超过一个临界值时，表面α =0变成一个开表面，不再是分界线，而且当β s大于第二个临界值时，只得到轴向均匀的构形。β s临界值的存在也可以用细长等离子体模型和考虑分界线外等离子体的轴向力平衡条件来解释。用该模型得到的临界值与二维数值计算结果以及等离子体中心面和端部的半径吻合得很好。
Two dimensional equilibria of field reversed configuration with plasma outside the separatrix is investigated. By numerical calculation, it is found that the separatrix (ψ=0) becomes spindly as β s (beta ratio on the surface ψ=0) increases. Remarkable is that the surface ψ=0 becomes an open surface and no more the separatrix as β s increases beyond a critical value, and furthermore, that only axially uniform configurations are obtained when β s is greater than a second critical value. Existence of the critical values of β s can be explained also with use of a long thin plasma model and a condition of axial force balance which takes into account the plasma outside the separatrix. The critical values obtained with this model well agree with the two dimensional numerical results as well as radii of the plasma both at the center plane and at the ends of vessel.