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Coriolis Force Effect on Suppression of Neo-Classical Tearing Mode Triggered Explosive Burst in Reversed Magnetic Shear Tokamak Plasmas
Chinese Physics Letters ( IF 3.5 ) Pub Date : 2021-05-24 , DOI: 10.1088/0256-307x/38/4/045204
Tong Liu , Lai Wei , Feng Wang , Zheng-Xiong Wang

We numerically investigate the Coriolis force effect on the suppression of an explosive burst, triggered by the neo-classical tearing mode, in reversed magnetic shear configuration tokamak plasmas, using a reduced magnetohydrodynamic model, including bootstrap current. Previous works have shown that applying differential poloidal rotation, with rotation shear located near the outer rational surface, is an effective way to suppress an explosive burst. In comparison with cases where there is no Coriolis force, the amplitude of differential poloidal rotation required to effectively suppress the explosive burst is clearly reduced once the effect of Coriolis force is taken into consideration. Moreover, the effective radial region of the rotation shear location is broadened in cases where the Coriolis force effect is present. Applying rotation with shear located between the radial positions of q min and the outer rational surface always serves to effectively suppress explosive bursts, which we anticipate will reduce operational difficulties in controlling explosive bursts, and will consequently prevent plasma disruption in tokamak experiments.



中文翻译:

科里奥利力对抑制反向磁剪切托卡马克等离子体中新古典撕裂模式触发爆炸的影响

我们使用简化的磁流体动力学模型(包括自举电流)在反向磁剪切构型托卡马克等离子体中数值研究了科里奥利力对抑制由新经典撕裂模式触发的爆炸性爆发的影响。以前的工作表明,应用微分极向旋转,旋转剪切位于外部理性表面附近,是抑制爆炸爆发的有效方法。与没有科里奥利力的情况相比,一旦考虑科里奥利力的影响,有效抑制爆炸爆发所需的微分极向旋转幅度明显减小。此外,在存在科里奥利力效应的情况下,旋转剪切位置的有效径向区域会变宽。q min和外理性表面总是有效地抑制爆炸爆发,我们预计这将减少控制爆炸爆发的操作困难,从而防止托卡马克实验中的等离子体破坏。

更新日期:2021-05-24
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