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为了研究托卡马克等离子体中撕裂模与外加扰动磁场的相互作用机理,J-TEXT托卡马克装置设计安装了静态和动态两套外加扰动场线圈,并开展了一系列扰动场与撕裂模相互作用的实验研究,对具有明显初始撕裂模的等离子体,外加静态扰动磁场可能导致锁模,也可能抑制撕裂模,当等离子体中没有明显的初始撕裂模时,加入较强的静态扰动场将导致撕裂模穿透现象,而利用动态扰动场线圈产生的2/1转动扰动场,观察到了撕裂模磁岛的加速和锁模解锁的现象。实验结果表明,撕裂模与外加扰动场之间作用明显,扰动场是一种很有希望的撕裂模控制手段。
In order to study the mechanism of the interaction between tear modes and externally perturbed magnetic fields in a Tokamak plasma, the J-TEXT Tokamak device was designed with static and dynamic two sets of perturbed field coils and a series of perturbation fields and tearing In the experimental study of mode interaction, a plasma with a distinct initial tearing mode, plus a static perturbation magnetic field, may result in mode-locking or tearing modes. When there is no obvious initial tearing mode in the plasma, The static perturbation field will lead to the penetration of the tearing modes. By using the 2/1 rotation perturbation field generated by the dynamic disturbance field coil, the acceleration of the tearing mode magnetic island and the mode-locked unlocking phenomenon are observed. The experimental results show that the interaction between the tearing modes and the external perturbation field is obvious, and the perturbation field is a promising means of tearing mode control.