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大家知道,环流器等离子体关于气球模的稳定性条件对等离子体比压值给出了最严厉的限制,对圆戳面环流器,典型的按体积平均比压值仅为(1—2)％,远低于反应堆的设计要求。许多人已对提高这一临界比压值的各种可能性进行过讨论,最近的研究指出,动力效应对于气球模不稳定性的阈值影响甚微,不过可使不稳定性的增长率降低很多。可是,我们曾发现,可以存在比压值很高的平衡位形,它们对于局部Mercier模是稳定的。这类平衡位形的特点是其q-剖面由等离子体中心向边缘下降。本文目的为验证这类位形相对于最危险的磁流体模式,即气球模的稳定性。
As we all know, the cyclone plasma on the stability of the balloon mold plasma pressure given the most stringent pressure limit, the circular surface puncher, the typical volume-specific average pressure value of only (1-2) %, Much lower than the reactor design requirements. Many people have discussed the possibilities for raising this threshold pressure ratio, and recent studies have shown that the effect of momentum has little effect on the threshold of balloon instability but can result in a much lower rate of increase in instability . However, we have discovered that there can be equilibrium configurations with higher than normal pressure values, which are stable to local Mercier modes. A feature of this type of equilibrium configuration is that its q-profile descends from the center of the plasma toward the edge. The purpose of this paper is to verify the stability of such a shape relative to the most dangerous magnetic fluid model, the balloon model.