高比压环流器等离子体位形的稳定性

本文用解析方法表示了高比压环流器的平衡位形,进而计算了局部理想磁流体判据,并着重讨论了低q运行的可能性。结果发现存在一大类具有这些特性的环流器平衡位形,有的位形其中心约束区域有很高的稳定性余度。对p′(ψ)剖面不同的位形以及不同位移函数的位形的稳定性做比较,发现大的位移及平坦的p′(ψ)剖面有更好的稳定性。 关键词：

STABILITY OF HIGH-BETA TOKAMAK PLASMAS

By means of expressing the equilibrium configurations of high-beta tokamak plasmas analytically, the ideal MHD local stability criterion is derived with emphasis on the exploration of the possibility of existence of low-q, high-beta tokamaks. Results obtained show that a great variety of equilibria with these figures of merit may exist, some of them having great stability margin in the central region of the confined plasma against the local modes. Comparisons are made of results corresponding to configurations with different p′(ψ) and △(ρ) functions (△ being the displacement of the magnetic surface) and the tendency is found that the larger the displacement and the flatter the p′(ψ) profile is, the more stable the equilibrium will be.