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首页> 外文期刊>Plasma physics and controlled fusion >The effect of the plasma position control system on the three-dimensional distortion of the plasma boundary when magnetic perturbations are applied in MAST
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The effect of the plasma position control system on the three-dimensional distortion of the plasma boundary when magnetic perturbations are applied in MAST

机译：当在MAST中应用磁扰动时，等离子体位置控制系统对等离子体边界的三维变形的影响

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摘要

When resonant magnetic perturbations are applied in MAST, the plasma edge boundary experiences a three-dimensional (3D) distortion, which can be a few percent of the minor radius in amplitude, in good agreement with ideal 3D equilibrium modelling. This displacement occurs in plasmas both with radial position feedback control applied, and without feedback. When position feedback control is employed, an applied non-axisymmetric field can lead to an exacerbated edge displacement due to an ancillary axisymmetric position correction, with the direction of the correction dependent upon the phase of the applied field with respect to the toroidal position of the sensors used in the controller. This suggests that future machines reliant upon resonant magnetic perturbations for controlling ELMs should consider using a plasma control system capable of applying a position correction which accounts for the non-axisymmetry of applied magnetic perturbations.
机译：当在MAST中应用共振磁扰动时，等离子体边缘边界会发生三维（3D）畸变，这可能是幅度较小半径的百分之几，与理想的3D平衡建模非常吻合。在采用径向位置反馈控制和没有反馈的情况下，等离子体中都会发生这种位移。当采用位置反馈控制时，由于辅助轴对称位置校正，所施加的非轴对称磁场会导致加剧的边缘位移，校正的方向取决于所施加磁场相对于环的环形位置的相位。控制器中使用的传感器。这表明依赖于共振电磁扰动来控制ELM的未来机器应考虑使用能够进行位置校正的等离子控制系统，该校正解决了施加的电磁扰动的非轴对称性。

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