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在托卡马克等离子体放电中,理想的金属壳壁对等离子体中的电磁扰动起稳定作用。电阻性金属壁与等离子体中电磁扰动的作用导致等离子体流速的降低和扰动频率的减少,这种相互作用的增强能够引起等离子体中撕裂模“锁模”现象。下面将讨论在中空的电流分布下,等离子体中存在两个相同模数撕裂模有理面时,撕裂模之间的相互作用和电阻性金属壁对撕裂模稳定性的影响。
In tokamak plasma discharge, the ideal metal shell wall stabilizes the electromagnetic perturbations in the plasma. The interaction of the resistive metal wall with the electromagnetic disturbance in the plasma results in a decrease of the plasma flow rate and a decrease of the disturbance frequency. Such an enhancement of the interaction can cause a “mode-locking” tear pattern in the plasma. In the following, we discuss the effect of the interaction between tear modes and the resistive metal wall on the stability of the tear die when there are two identical modulus tearing surfaces in the plasma under a hollow current distribution.