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Plasma equilibrium control during slow plasma current quench with avoidance of plasma-wall interaction in JT-60U

R. Yoshino, Y. Nakamura, Y. Neyatani1997年被引用 13Nuclear FusionIF 3出版社

In JT-60U a vertical displacement event (VDE) is observed during slow plasma current quench (Ip quench) for a vertically elongated divertor plasma with a single null. The VDE is generated by an error in the feedback control of the vertical position of the plasma current centre (ZJ). It has been perfectly avoided by improving the accuracy of the ZJ measurement in real time. Furthermore, plasma-wall interaction has been avoided successfully during slow Ip quench owing to the good performance of the plasma equilibrium control system

日本語訳

JT-60Uにおいて、垂直に細長いダイバータ配位の単一ヌルプラズマで、プラズマ電流減衰(Ip減衰)中に垂直変位事象(VDE)が観測された。このVDEは、プラズマ電流中心(ZJ)の垂直位置フィードバック制御における誤差によって引き起こされたものである。ZJ測定の精度をリアルタイムで向上させることにより、VDEは完全に回避された。さらに、プラズマ平衡制御システムの優れた性能により、緩やかなIp減衰中にプラズマ-壁相互作用を首尾よく回避することができた。

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JT-60UPlasma equilibriumPlasma-wall interaction
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