托卡马克中等离子体柱的位移稳定性

本文考虑托卡马克中纵场的作用以及等离子体柱和与之有互感的外迴路的相互作用,在圆截面,瘦环假设下,得到了自由运动时相对于沿水平方向、垂直方向的位移,以及小半径变化的一般稳定条件。由于强纵场的影响,一般来说,等离子体柱的小半径总是随着大半径的变化而改变,以维持通过等离子体角向电流迴路的磁通不变。对于这种扰动,当考虑到外迴路电流变化以后,稳定区域超过公式0关键词：

ON THE DISPLACEMENT STABILITIES OF A PLASMA COLUMN IN TOKAMAK

A general stability condition against the horizontal and vertical displacements of a plasma column in tokamak and the change of its minor radius has been deduced, while the effect of the toroidal field and the interaction of the plasma column with the external circuits are taken into account, assuming circular minor crosssection of the plasma column and the ratio α/R<<1. In general, because of the effect of the strong field, the minor radius of the plasma column would change with the change of its major radius to maintain the conservation of the toroidal magnetic flux in the angular plasma current circuit. When the variations of the currents in external circuits are considered, the stability region for such displacement pertur-bance is wider than 0